diff --git a/nixos/lib/testing.nix b/nixos/lib/testing.nix
index 5f463c09284..f7159634e4f 100644
--- a/nixos/lib/testing.nix
+++ b/nixos/lib/testing.nix
@@ -113,14 +113,14 @@ rec {
             --add-flags "$vms" \
             ${lib.optionalString enableOCR "--prefix PATH : '${ocrProg}/bin'"} \
             --run "testScript=\"\$(cat $out/test-script)\"" \
-            --set testScript '$testScript' \
-            --set VLANS '${toString vlans}'
+            --set testScript '"$testScript"' \
+            --set VLANS '"${toString vlans}"'
           ln -s ${testDriver}/bin/nixos-test-driver $out/bin/nixos-run-vms
           wrapProgram $out/bin/nixos-run-vms \
             --add-flags "$vms" \
             ${lib.optionalString enableOCR "--prefix PATH : '${ocrProg}/bin'"} \
-            --set tests 'startAll; joinAll;' \
-            --set VLANS '${toString vlans}' \
+            --set tests '"startAll; joinAll;"' \
+            --set VLANS '"${toString vlans}"' \
             ${lib.optionalString (builtins.length vms == 1) "--set USE_SERIAL 1"}
         ''; # "
 
diff --git a/pkgs/applications/graphics/leocad/default.nix b/pkgs/applications/graphics/leocad/default.nix
index 96384765bd0..884dc115853 100644
--- a/pkgs/applications/graphics/leocad/default.nix
+++ b/pkgs/applications/graphics/leocad/default.nix
@@ -17,7 +17,6 @@ stdenv.mkDerivation rec {
   buildInputs = [ qt4 qmake4Hook zlib ];
 
   postPatch = ''
-    sed '1i#include <cmath>' -i common/camera.cpp
     substituteInPlace common/camera.cpp --replace "isnan(" "std::isnan("
     export qmakeFlags="$qmakeFlags INSTALL_PREFIX=$out"
   '';
diff --git a/pkgs/applications/graphics/photivo/default.nix b/pkgs/applications/graphics/photivo/default.nix
index d84363df899..12816ba96af 100644
--- a/pkgs/applications/graphics/photivo/default.nix
+++ b/pkgs/applications/graphics/photivo/default.nix
@@ -10,19 +10,15 @@ stdenv.mkDerivation rec {
     sha256 = "0f6y18k7db2ci6xn664zcwm1g1k04sdv7gg1yd5jk41bndjb7z8h";
   };
 
-  postPatch = '' # kinda icky
+  nativeBuildInputs = [ cmake pkgconfig ];
+
+  buildInputs = [ qt4 fftw graphicsmagick_q16 lcms2 lensfun libjpeg exiv2 liblqr1 ];
+  patchPhase = '' # kinda icky
     sed -e '/("@INSTALL@")/d' \
         -e s,@INSTALL@,$out/share/photivo, \
         -i Sources/ptSettings.cpp
-    sed '1i#include <math.h>' -i Sources/filters/ptFilter_StdCurve.cpp
   '';
 
-  nativeBuildInputs = [ cmake pkgconfig ];
-
-  buildInputs = [ qt4 fftw graphicsmagick_q16 lcms2 lensfun libjpeg exiv2 liblqr1 ];
-
-  enableParallelBuilding = true;
-
   meta = with stdenv.lib; {
       platforms = platforms.linux;
       maintainers = [ maintainers.mornfall ];
diff --git a/pkgs/applications/misc/cli-visualizer/default.nix b/pkgs/applications/misc/cli-visualizer/default.nix
index 1c7fd62f8ec..6b9856a996a 100644
--- a/pkgs/applications/misc/cli-visualizer/default.nix
+++ b/pkgs/applications/misc/cli-visualizer/default.nix
@@ -10,10 +10,6 @@ stdenv.mkDerivation rec {
     sha256 = "16768gyi85mkizfn874q2q9xf32knw08z27si3k5bk99492dxwzw";
   };
 
-  postPatch = ''
-    sed '1i#include <cmath>' -i src/Transformer/SpectrumCircleTransformer.cpp
-  '';
-
   buildInputs = [ fftw ncurses libpulseaudio ];
 
   buildFlags = [ "ENABLE_PULSE=1" ];
diff --git a/pkgs/applications/misc/termite/default.nix b/pkgs/applications/misc/termite/default.nix
index 33c42e3dc1d..33bc29f871c 100644
--- a/pkgs/applications/misc/termite/default.nix
+++ b/pkgs/applications/misc/termite/default.nix
@@ -13,8 +13,6 @@ let
       sha256 = "1cw4yw7n9m2si8b7zcfyz9pyihncabxm5g39v1mxslfajxgwzmd8";
     };
 
-    postPatch = "sed '1i#include <math.h>' -i termite.cc";
-
     makeFlags = [ "VERSION=v${version}" "PREFIX=" "DESTDIR=$(out)" ];
 
     buildInputs = [ pkgconfig vte gtk3 ncurses ];
diff --git a/pkgs/applications/science/robotics/qgroundcontrol/default.nix b/pkgs/applications/science/robotics/qgroundcontrol/default.nix
index 81f5accd478..1e33a1be856 100644
--- a/pkgs/applications/science/robotics/qgroundcontrol/default.nix
+++ b/pkgs/applications/science/robotics/qgroundcontrol/default.nix
@@ -27,11 +27,6 @@ stdenv.mkDerivation rec {
  ] ++ qtInputs;
 
   patches = [ ./0001-fix-gcc-cmath-namespace-issues.patch ];
-  postPatch = ''
-    sed '1i#include <cmath>' -i src/Vehicle/Vehicle.cc \
-      -i src/comm/{QGCFlightGearLink,QGCJSBSimLink}.cc \
-      -i src/{uas/UAS,ui/QGCDataPlot2D}.cc
-  '';
 
   preConfigure = ''
     mkdir build
diff --git a/pkgs/applications/video/simplescreenrecorder/default.nix b/pkgs/applications/video/simplescreenrecorder/default.nix
index 3ea04a39393..a5fb122cf89 100644
--- a/pkgs/applications/video/simplescreenrecorder/default.nix
+++ b/pkgs/applications/video/simplescreenrecorder/default.nix
@@ -11,15 +11,11 @@ stdenv.mkDerivation rec {
     sha256 = "1d89ncspjd8c4mckf0nb6y3hrxpv4rjpbj868pznhvfmdgr5nvql";
   };
 
-  postPatch = "sed '1i#include <random>' -i src/Benchmark.cpp";
-
   buildInputs = [
     alsaLib ffmpeg libjack2 libX11 libXext libXfixes mesa pkgconfig
     libpulseaudio qt4
   ];
 
-  enableParallelBuilding = true;
-
   meta = with stdenv.lib; {
     description = "A screen recorder for Linux";
     homepage = http://www.maartenbaert.be/simplescreenrecorder;
diff --git a/pkgs/applications/virtualization/virtualbox/default.nix b/pkgs/applications/virtualization/virtualbox/default.nix
index ebdac411b11..df7b555e048 100644
--- a/pkgs/applications/virtualization/virtualbox/default.nix
+++ b/pkgs/applications/virtualization/virtualbox/default.nix
@@ -97,14 +97,7 @@ in stdenv.mkDerivation {
     set +x
   '';
 
-  patches = optional enableHardening ./hardened.patch
-    ++ [
-      (fetchurl rec {
-        name = "fix-detect-gcc-5.4.patch";
-        url = "https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=827193;filename=${name};msg=5";
-        sha256 = "0y6v5dc6fqj9iv27cl8q2g87v1kxg19129mpas4vjg7g0529v4g9";
-      })
-    ];
+  patches = optional enableHardening ./hardened.patch;
 
   postPatch = ''
     sed -i -e 's|/sbin/ifconfig|${nettools}/bin/ifconfig|' \
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index a37c806905f..da114fdb347 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -96,7 +96,6 @@ stdenv.mkDerivation {
       echo "-L${libc_lib}/lib" > $out/nix-support/libc-ldflags
 
       echo "${libc_lib}" > $out/nix-support/orig-libc
-      echo "${libc_dev}" > $out/nix-support/orig-libc-dev
     ''
 
     + (if nativeTools then ''
diff --git a/pkgs/build-support/gcc-cross-wrapper/builder.sh b/pkgs/build-support/gcc-cross-wrapper/builder.sh
index 9396ace84f1..c6bc2a7c8bf 100644
--- a/pkgs/build-support/gcc-cross-wrapper/builder.sh
+++ b/pkgs/build-support/gcc-cross-wrapper/builder.sh
@@ -111,7 +111,6 @@ chmod +x "$out/bin/$crossConfig-ld"
 # Glibc.
 test -n "$gcc" && echo $gcc > $out/nix-support/orig-cc
 test -n "$libc" && echo $libc > $out/nix-support/orig-libc
-test -n "$libc_dev" && echo $libc_dev > $out/nix-support/orig-libc-dev
 
 doSubstitute "$addFlags" "$out/nix-support/add-flags"
 
diff --git a/pkgs/build-support/gcc-cross-wrapper/default.nix b/pkgs/build-support/gcc-cross-wrapper/default.nix
index 505d80a6b2a..d3494b83a87 100644
--- a/pkgs/build-support/gcc-cross-wrapper/default.nix
+++ b/pkgs/build-support/gcc-cross-wrapper/default.nix
@@ -44,9 +44,7 @@ stdenv.mkDerivation {
   ldWrapper = ./ld-wrapper.sh;
   utils = ./utils.sh;
   addFlags = ./add-flags;
-  inherit nativeTools nativeLibc nativePrefix gcc binutils;
-  libc = if libc ? out then libc.out else libc;
-  libc_dev = if libc ? dev then libc.dev else libc;
+  inherit nativeTools nativeLibc nativePrefix gcc libc binutils;
   crossConfig = if cross != null then cross.config else null;
   osxMinVersion = cross.osxMinVersion or null;
   gccLibs = if gcc != null then gccLibs else null;
diff --git a/pkgs/build-support/setup-hooks/make-wrapper.sh b/pkgs/build-support/setup-hooks/make-wrapper.sh
index d922db5ccf5..7d0f88abb85 100644
--- a/pkgs/build-support/setup-hooks/make-wrapper.sh
+++ b/pkgs/build-support/setup-hooks/make-wrapper.sh
@@ -16,7 +16,7 @@ makeWrapper() {
             varName=${params[$((n + 1))]}
             value=${params[$((n + 2))]}
             n=$((n + 2))
-            echo "export $varName=\"$value\"" >> $wrapper
+            echo "export $varName=$value" >> $wrapper
         fi
 
         if test "$p" = "--unset"; then
diff --git a/pkgs/build-support/trivial-builders.nix b/pkgs/build-support/trivial-builders.nix
index 18e49105ae7..73f4d7783c4 100644
--- a/pkgs/build-support/trivial-builders.nix
+++ b/pkgs/build-support/trivial-builders.nix
@@ -8,7 +8,6 @@ rec {
   runCommand = name: env: buildCommand:
     stdenv.mkDerivation ({
       inherit name buildCommand;
-      passAsFile = [ "buildCommand" ];
     } // env);
 
 
diff --git a/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix b/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix
index a955f5cf8a4..77cd666b8c6 100644
--- a/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix
+++ b/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix
@@ -3,7 +3,7 @@
 let
 
   common = { pname, sha256 }: stdenv.mkDerivation rec {
-    name = "${pname}-1.79.1";
+    name = "${pname}-1.78.1";
 
     src = fetchurl {
       url = "mirror://sourceforge/docbook/${name}.tar.bz2";
@@ -35,12 +35,12 @@ in {
 
   docbook_xsl = common {
     pname = "docbook-xsl";
-    sha256 = "0s59lihif2fr7rznckxr2kfyrvkirv76r1zvidp9b5mj28p4apvj";
+    sha256 = "0rxl013ncmz1n6ymk2idvx3hix9pdabk8xn01cpcv32wmfb753y9";
   };
 
   docbook_xsl_ns = common {
     pname = "docbook-xsl-ns";
-    sha256 = "170ggf5dgjar65kkn5n33kvjr3pdinpj66nnxfx8b2avw0k91jin";
+    sha256 = "1x3sc0axk9z3i6n0jhlsmzlmb723a4sjgslm9g12by6phirdx3ng";
   };
 
 }
diff --git a/pkgs/desktops/kde-5/plasma-5.6/plasma-desktop/default.nix b/pkgs/desktops/kde-5/plasma-5.6/plasma-desktop/default.nix
index 2a1d95806c1..618e7387e62 100644
--- a/pkgs/desktops/kde-5/plasma-5.6/plasma-desktop/default.nix
+++ b/pkgs/desktops/kde-5/plasma-5.6/plasma-desktop/default.nix
@@ -34,9 +34,6 @@ plasmaPackage rec {
     })
     ./0003-tzdir.patch
   ];
-  postPatch = ''
-    sed '1i#include <cmath>' -i kcms/touchpad/src/backends/x11/synapticstouchpad.cpp
-  '';
   NIX_CFLAGS_COMPILE = [ "-I${xorgserver.dev}/include/xorg" ];
   cmakeFlags = [
     "-DEvdev_INCLUDE_DIRS=${xf86inputevdev.dev}/include/xorg"
diff --git a/pkgs/development/compilers/gcc/4.5/default.nix b/pkgs/development/compilers/gcc/4.5/default.nix
index 69ff590a631..b1eedf7707d 100644
--- a/pkgs/development/compilers/gcc/4.5/default.nix
+++ b/pkgs/development/compilers/gcc/4.5/default.nix
@@ -179,11 +179,11 @@ stdenv.mkDerivation ({
            sed -i "${gnu_h}" \
                -es'|LIB_SPEC *"\(.*\)$|LIB_SPEC "${extraLibSpec} \1|g'
 
-           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc.dev}/include'..."
+           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc}/include'..."
            sed -i "${gnu_h}" \
-               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc.dev}/include"|g'
+               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc}/include"|g'
            sed -i gcc/config/t-gnu \
-               -es'|NATIVE_SYSTEM_HEADER_DIR.*$|NATIVE_SYSTEM_HEADER_DIR = ${libc.dev}/include|g'
+               -es'|NATIVE_SYSTEM_HEADER_DIR.*$|NATIVE_SYSTEM_HEADER_DIR = ${libc}/include|g'
         ''
     else if cross != null || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
@@ -197,7 +197,7 @@ stdenv.mkDerivation ({
              grep -q LIBC_DYNAMIC_LINKER "$header" || continue
              echo "  fixing \`$header'..."
              sed -i "$header" \
-                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc.out}\3"|g'
+                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc}\3"|g'
            done
         ''
     else null;
@@ -205,10 +205,10 @@ stdenv.mkDerivation ({
   inherit noSysDirs profiledCompiler staticCompiler langJava crossStageStatic
     libcCross crossMingw;
 
-  nativeBuildInputs = [ texinfo which gettext ]
+  nativeBuildInputs = [ texinfo which ]
     ++ optional (perl != null) perl;
     
-  buildInputs = [ gmp mpfr libmpc libelf ]
+  buildInputs = [ gmp mpfr libmpc libelf gettext ]
     ++ (optional (ppl != null) ppl)
     ++ (optional (cloogppl != null) cloogppl)
     ++ (optional (zlib != null) zlib)
@@ -284,7 +284,6 @@ stdenv.mkDerivation ({
       ${if langJava && javaAntlr != null then "--with-antlr-jar=${javaAntlr.crossDrv}" else ""}
       --with-gmp=${gmp.crossDrv}
       --with-mpfr=${mpfr.crossDrv}
-      --with-mpc=${libmpc.crossDrv}
       --disable-libstdcxx-pch
       --without-included-gettext
       --with-system-zlib
@@ -347,28 +346,15 @@ stdenv.mkDerivation ({
                                           ++ optional (libpthread != null) libpthread)));
 
   EXTRA_TARGET_CFLAGS =
-    if cross != null && libcCross != null then [
-        "-idirafter ${libcCross.dev}/include"
-      ]
-      ++ optionals (! crossStageStatic) [
-        "-B${libcCross.out}/lib"
-      ]
+    if cross != null && libcCross != null
+    then "-idirafter ${libcCross}/include"
     else null;
 
   EXTRA_TARGET_LDFLAGS =
-    if cross != null && libcCross != null then [
-        "-Wl,-L${libcCross.out}/lib"
-      ]
-      ++ (if crossStageStatic then [
-        "-B${libcCross.out}/lib"
-      ] else [
-        "-Wl,-rpath,${libcCross.out}/lib"
-        "-Wl,-rpath-link,${libcCross.out}/lib"
-      ])
-      ++ optionals (libpthreadCross != null) [
-        "-L${libpthreadCross}/lib"
-        "-Wl,${libpthreadCross.TARGET_LDFLAGS}"
-      ]
+    if cross != null && libcCross != null
+    then "-B${libcCross}/lib -Wl,-L${libcCross}/lib" +
+         (optionalString (libpthreadCross != null)
+           " -L${libpthreadCross}/lib -Wl,${libpthreadCross.TARGET_LDFLAGS}")
     else null;
 
   passthru = { inherit langC langCC langAda langFortran langVhdl
diff --git a/pkgs/development/compilers/gcc/4.6/builder.sh b/pkgs/development/compilers/gcc/4.6/builder.sh
index 6087bb30cfb..af36ec33b70 100644
--- a/pkgs/development/compilers/gcc/4.6/builder.sh
+++ b/pkgs/development/compilers/gcc/4.6/builder.sh
@@ -209,9 +209,7 @@ postInstall() {
     # Move runtime libraries to $lib.
     mkdir -p $lib/lib
     ln -s lib $lib/lib64
-    moveToOutput "lib/lib*.so"        "$lib"
-    moveToOutput "lib/lib*.so.*[0-9]" "$lib"
-    moveToOutput "lib/*.la"           "$lib"
+    mv -v $out/lib/lib*.so $out/lib/lib*.so.*[0-9] $out/lib/*.la $lib/lib/
     for i in $lib/lib/*.la; do
         substituteInPlace $i --replace $out $lib
     done
diff --git a/pkgs/development/compilers/gcc/4.6/default.nix b/pkgs/development/compilers/gcc/4.6/default.nix
index 330f8a7cf8e..7003f4335c8 100644
--- a/pkgs/development/compilers/gcc/4.6/default.nix
+++ b/pkgs/development/compilers/gcc/4.6/default.nix
@@ -229,11 +229,11 @@ stdenv.mkDerivation ({
            sed -i "${gnu_h}" \
                -es'|LIB_SPEC *"\(.*\)$|LIB_SPEC "${extraLibSpec} \1|g'
 
-           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc.dev}/include'..."
+           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc}/include'..."
            sed -i "${gnu_h}" \
-               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc.dev}/include"|g'
+               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc}/include"|g'
            sed -i gcc/config/t-gnu \
-               -es'|NATIVE_SYSTEM_HEADER_DIR.*$|NATIVE_SYSTEM_HEADER_DIR = ${libc.dev}/include|g'
+               -es'|NATIVE_SYSTEM_HEADER_DIR.*$|NATIVE_SYSTEM_HEADER_DIR = ${libc}/include|g'
         ''
     else if cross != null || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
@@ -247,7 +247,7 @@ stdenv.mkDerivation ({
              grep -q LIBC_DYNAMIC_LINKER "$header" || continue
              echo "  fixing \`$header'..."
              sed -i "$header" \
-                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc.out}\3"|g'
+                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc}\3"|g'
            done
         ''
     else null;
@@ -357,7 +357,6 @@ stdenv.mkDerivation ({
       ${if langJava && javaAntlr != null then "--with-antlr-jar=${javaAntlr.crossDrv}" else ""}
       --with-gmp=${gmp.crossDrv}
       --with-mpfr=${mpfr.crossDrv}
-      --with-mpc=${libmpc.crossDrv}
       --disable-libstdcxx-pch
       --without-included-gettext
       --with-system-zlib
@@ -422,28 +421,15 @@ stdenv.mkDerivation ({
                                           ++ optional (libpthread != null) libpthread)));
 
   EXTRA_TARGET_CFLAGS =
-    if cross != null && libcCross != null then [
-        "-idirafter ${libcCross.dev}/include"
-      ]
-      ++ optionals (! crossStageStatic) [
-        "-B${libcCross.out}/lib"
-      ]
+    if cross != null && libcCross != null
+    then "-idirafter ${libcCross}/include"
     else null;
 
   EXTRA_TARGET_LDFLAGS =
-    if cross != null && libcCross != null then [
-        "-Wl,-L${libcCross.out}/lib"
-      ]
-      ++ (if crossStageStatic then [
-        "-B${libcCross.out}/lib"
-      ] else [
-        "-Wl,-rpath,${libcCross.out}/lib"
-        "-Wl,-rpath-link,${libcCross.out}/lib"
-      ])
-      ++ optionals (libpthreadCross != null) [
-        "-L${libpthreadCross}/lib"
-        "-Wl,${libpthreadCross.TARGET_LDFLAGS}"
-      ]
+    if cross != null && libcCross != null
+    then "-B${libcCross}/lib -Wl,-L${libcCross}/lib" +
+         (optionalString (libpthreadCross != null)
+           " -L${libpthreadCross}/lib -Wl,${libpthreadCross.TARGET_LDFLAGS}")
     else null;
 
   passthru = { inherit langC langCC langAda langFortran langVhdl
diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index 32a43a24efd..6810b52574c 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -164,8 +164,8 @@ let version = "4.8.5";
           " --disable-libatomic " +  # libatomic requires libc
           " --disable-decimal-float" # libdecnumber requires libc
           else
-          (if crossDarwin then " --with-sysroot=${libcCross.out}/share/sysroot"
-           else                " --with-headers=${libcCross.dev}/include") +
+          (if crossDarwin then " --with-sysroot=${libcCross}/share/sysroot"
+           else                " --with-headers=${libcCross}/include") +
           # Ensure that -print-prog-name is able to find the correct programs.
           (stdenv.lib.optionalString (crossMingw || crossDarwin) (
             " --with-as=${binutilsCross}/bin/${cross.config}-as" +
@@ -255,9 +255,9 @@ stdenv.mkDerivation ({
            sed -i "${gnu_h}" \
                -es'|LIB_SPEC *"\(.*\)$|LIB_SPEC "${extraLibSpec} \1|g'
 
-           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc.dev}/include'..."
+           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc}/include'..."
            sed -i "${gnu_h}" \
-               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc.dev}/include"|g'
+               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc}/include"|g'
         ''
     else if cross != null || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
@@ -271,7 +271,7 @@ stdenv.mkDerivation ({
              grep -q LIBC_DYNAMIC_LINKER "$header" || continue
              echo "  fixing \`$header'..."
              sed -i "$header" \
-                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc.out}\3"|g'
+                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc}\3"|g'
            done
         ''
     else null;
@@ -415,7 +415,6 @@ stdenv.mkDerivation ({
       ${if langJava && javaAntlr != null then "--with-antlr-jar=${javaAntlr.crossDrv}" else ""}
       --with-gmp=${gmp.crossDrv}
       --with-mpfr=${mpfr.crossDrv}
-      --with-mpc=${libmpc.crossDrv}
       --disable-libstdcxx-pch
       --without-included-gettext
       --with-system-zlib
@@ -483,28 +482,15 @@ stdenv.mkDerivation ({
                                           ++ optional (libpthread != null) libpthread)));
 
   EXTRA_TARGET_CFLAGS =
-    if cross != null && libcCross != null then [
-        "-idirafter ${libcCross.dev}/include"
-      ]
-      ++ optionals (! crossStageStatic) [
-        "-B${libcCross.out}/lib"
-      ]
+    if cross != null && libcCross != null
+    then "-idirafter ${libcCross}/include"
     else null;
 
   EXTRA_TARGET_LDFLAGS =
-    if cross != null && libcCross != null then [
-        "-Wl,-L${libcCross.out}/lib"
-      ]
-      ++ (if crossStageStatic then [
-        "-B${libcCross.out}/lib"
-      ] else [
-        "-Wl,-rpath,${libcCross.out}/lib"
-        "-Wl,-rpath-link,${libcCross.out}/lib"
-      ])
-      ++ optionals (libpthreadCross != null) [
-        "-L${libpthreadCross}/lib"
-        "-Wl,${libpthreadCross.TARGET_LDFLAGS}"
-      ]
+    if cross != null && libcCross != null
+    then "-B${libcCross}/lib -Wl,-L${libcCross}/lib" +
+         (optionalString (libpthreadCross != null)
+           " -L${libpthreadCross}/lib -Wl,${libpthreadCross.TARGET_LDFLAGS}")
     else null;
 
   passthru =
diff --git a/pkgs/development/compilers/gcc/4.9/default.nix b/pkgs/development/compilers/gcc/4.9/default.nix
index 6a9078fefce..195a7b03eed 100644
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@@ -166,8 +166,8 @@ let version = "4.9.3";
           " --disable-libatomic " +  # libatomic requires libc
           " --disable-decimal-float" # libdecnumber requires libc
           else
-          (if crossDarwin then " --with-sysroot=${libcCross.out}/share/sysroot"
-           else                " --with-headers=${libcCross.dev}/include") +
+          (if crossDarwin then " --with-sysroot=${libcCross}/share/sysroot"
+           else                " --with-headers=${libcCross}/include") +
           # Ensure that -print-prog-name is able to find the correct programs.
           (stdenv.lib.optionalString (crossMingw || crossDarwin) (
             " --with-as=${binutilsCross}/bin/${cross.config}-as" +
@@ -258,9 +258,9 @@ stdenv.mkDerivation ({
            sed -i "${gnu_h}" \
                -es'|LIB_SPEC *"\(.*\)$|LIB_SPEC "${extraLibSpec} \1|g'
 
-           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc.dev}/include'..."
+           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc}/include'..."
            sed -i "${gnu_h}" \
-               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc.dev}/include"|g'
+               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc}/include"|g'
         ''
     else if cross != null || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
@@ -274,7 +274,7 @@ stdenv.mkDerivation ({
              grep -q LIBC_DYNAMIC_LINKER "$header" || continue
              echo "  fixing \`$header'..."
              sed -i "$header" \
-                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc.out}\3"|g'
+                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc}\3"|g'
            done
         ''
     else null;
@@ -422,7 +422,6 @@ stdenv.mkDerivation ({
       ${if langJava && javaAntlr != null then "--with-antlr-jar=${javaAntlr.crossDrv}" else ""}
       --with-gmp=${gmp.crossDrv}
       --with-mpfr=${mpfr.crossDrv}
-      --with-mpc=${libmpc.crossDrv}
       --disable-libstdcxx-pch
       --without-included-gettext
       --with-system-zlib
@@ -490,28 +489,15 @@ stdenv.mkDerivation ({
                                           ++ optional (libpthread != null) libpthread)));
 
   EXTRA_TARGET_CFLAGS =
-    if cross != null && libcCross != null then [
-        "-idirafter ${libcCross.dev}/include"
-      ]
-      ++ optionals (! crossStageStatic) [
-        "-B${libcCross.out}/lib"
-      ]
+    if cross != null && libcCross != null
+    then "-idirafter ${libcCross}/include"
     else null;
 
   EXTRA_TARGET_LDFLAGS =
-    if cross != null && libcCross != null then [
-        "-Wl,-L${libcCross.out}/lib"
-      ]
-      ++ (if crossStageStatic then [
-        "-B${libcCross.out}/lib"
-      ] else [
-        "-Wl,-rpath,${libcCross.out}/lib"
-        "-Wl,-rpath-link,${libcCross.out}/lib"
-      ])
-      ++ optionals (libpthreadCross != null) [
-        "-L${libpthreadCross}/lib"
-        "-Wl,${libpthreadCross.TARGET_LDFLAGS}"
-      ]
+    if cross != null && libcCross != null
+    then "-B${libcCross}/lib -Wl,-L${libcCross}/lib" +
+         (optionalString (libpthreadCross != null)
+           " -L${libpthreadCross}/lib -Wl,${libpthreadCross.TARGET_LDFLAGS}")
     else null;
 
   passthru =
diff --git a/pkgs/development/compilers/gcc/5/default.nix b/pkgs/development/compilers/gcc/5/default.nix
index 9ab725e2da8..9e0220ffc72 100644
--- a/pkgs/development/compilers/gcc/5/default.nix
+++ b/pkgs/development/compilers/gcc/5/default.nix
@@ -58,8 +58,7 @@ assert langGo -> langCC;
 with stdenv.lib;
 with builtins;
 
-let version = "5.4.0";
-    sha256 = "0fihlcy5hnksdxk0sn6bvgnyq8gfrgs8m794b1jxwd1dxinzg3b0";
+let version = "5.3.0";
 
     # Whether building a cross-compiler for GNU/Hurd.
     crossGNU = cross != null && cross.config == "i586-pc-gnu";
@@ -166,8 +165,8 @@ let version = "5.4.0";
           " --disable-libatomic " +  # libatomic requires libc
           " --disable-decimal-float" # libdecnumber requires libc
           else
-          (if crossDarwin then " --with-sysroot=${getLib libcCross}/share/sysroot"
-           else                " --with-headers=${getDev libcCross}/include") +
+          (if crossDarwin then " --with-sysroot=${libcCross}/share/sysroot"
+           else                " --with-headers=${libcCross}/include") +
           # Ensure that -print-prog-name is able to find the correct programs.
           (stdenv.lib.optionalString (crossMingw || crossDarwin) (
             " --with-as=${binutilsCross}/bin/${cross.config}-as" +
@@ -213,7 +212,7 @@ stdenv.mkDerivation ({
 
   src = fetchurl {
     url = "mirror://gnu/gcc/gcc-${version}/gcc-${version}.tar.bz2";
-    inherit sha256;
+    sha256 = "1ny4smkp5bzs3cp8ss7pl6lk8yss0d9m4av1mvdp72r1x695akxq";
   };
 
   inherit patches;
@@ -257,9 +256,9 @@ stdenv.mkDerivation ({
            sed -i "${gnu_h}" \
                -es'|LIB_SPEC *"\(.*\)$|LIB_SPEC "${extraLibSpec} \1|g'
 
-           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc.dev}/include'..."
+           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc}/include'..."
            sed -i "${gnu_h}" \
-               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc.dev}/include"|g'
+               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc}/include"|g'
         ''
     else if cross != null || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
@@ -273,7 +272,7 @@ stdenv.mkDerivation ({
              grep -q LIBC_DYNAMIC_LINKER "$header" || continue
              echo "  fixing \`$header'..."
              sed -i "$header" \
-                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc.out}\3"|g'
+                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc}\3"|g'
            done
         ''
     else null;
@@ -416,7 +415,6 @@ stdenv.mkDerivation ({
       ${if langJava && javaAntlr != null then "--with-antlr-jar=${javaAntlr.crossDrv}" else ""}
       --with-gmp=${gmp.crossDrv}
       --with-mpfr=${mpfr.crossDrv}
-      --with-mpc=${libmpc.crossDrv}
       --disable-libstdcxx-pch
       --without-included-gettext
       --with-system-zlib
@@ -484,28 +482,15 @@ stdenv.mkDerivation ({
                                           ++ optional (libpthread != null) libpthread)));
 
   EXTRA_TARGET_CFLAGS =
-    if cross != null && libcCross != null then [
-        "-idirafter ${getDev libcCross}/include"
-      ]
-      ++ optionals (! crossStageStatic) [
-        "-B${libcCross.out}/lib"
-      ]
+    if cross != null && libcCross != null
+    then "-idirafter ${libcCross}/include"
     else null;
 
   EXTRA_TARGET_LDFLAGS =
-    if cross != null && libcCross != null then [
-        "-Wl,-L${libcCross.out}/lib"
-      ]
-      ++ (if crossStageStatic then [
-        "-B${libcCross.out}/lib"
-      ] else [
-        "-Wl,-rpath,${libcCross.out}/lib"
-        "-Wl,-rpath-link,${libcCross.out}/lib"
-      ])
-      ++ optionals (libpthreadCross != null) [
-        "-L${libpthreadCross}/lib"
-        "-Wl,${libpthreadCross.TARGET_LDFLAGS}"
-      ]
+    if cross != null && libcCross != null
+    then "-B${libcCross}/lib -Wl,-L${libcCross}/lib" +
+         (optionalString (libpthreadCross != null)
+           " -L${libpthreadCross}/lib -Wl,${libpthreadCross.TARGET_LDFLAGS}")
     else null;
 
   passthru =
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index d281488fd50..6ca0f2f59f4 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -165,8 +165,8 @@ let version = "6.1.0";
           " --disable-libatomic " +  # libatomic requires libc
           " --disable-decimal-float" # libdecnumber requires libc
           else
-          (if crossDarwin then " --with-sysroot=${libcCross.out}/share/sysroot"
-           else                " --with-headers=${libcCross.dev}/include") +
+          (if crossDarwin then " --with-sysroot=${libcCross}/share/sysroot"
+           else                " --with-headers=${libcCross}/include") +
           # Ensure that -print-prog-name is able to find the correct programs.
           (stdenv.lib.optionalString (crossMingw || crossDarwin) (
             " --with-as=${binutilsCross}/bin/${cross.config}-as" +
@@ -256,9 +256,9 @@ stdenv.mkDerivation ({
            sed -i "${gnu_h}" \
                -es'|LIB_SPEC *"\(.*\)$|LIB_SPEC "${extraLibSpec} \1|g'
 
-           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc.dev}/include'..."
+           echo "setting \`NATIVE_SYSTEM_HEADER_DIR' and \`STANDARD_INCLUDE_DIR' to \`${libc}/include'..."
            sed -i "${gnu_h}" \
-               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc.dev}/include"|g'
+               -es'|#define STANDARD_INCLUDE_DIR.*$|#define STANDARD_INCLUDE_DIR "${libc}/include"|g'
         ''
     else if cross != null || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
@@ -272,7 +272,7 @@ stdenv.mkDerivation ({
              grep -q LIBC_DYNAMIC_LINKER "$header" || continue
              echo "  fixing \`$header'..."
              sed -i "$header" \
-                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc.out}\3"|g'
+                 -e 's|define[[:blank:]]*\([UCG]\+\)LIBC_DYNAMIC_LINKER\([0-9]*\)[[:blank:]]"\([^\"]\+\)"$|define \1LIBC_DYNAMIC_LINKER\2 "${libc}\3"|g'
            done
         ''
     else null;
@@ -482,28 +482,15 @@ stdenv.mkDerivation ({
                                           ++ optional (libpthread != null) libpthread)));
 
   EXTRA_TARGET_CFLAGS =
-    if cross != null && libcCross != null then [
-        "-idirafter ${libcCross.dev}/include"
-      ]
-      ++ optionals (! crossStageStatic) [
-        "-B${libcCross.out}/lib"
-      ]
+    if cross != null && libcCross != null
+    then "-idirafter ${libcCross}/include"
     else null;
 
   EXTRA_TARGET_LDFLAGS =
-    if cross != null && libcCross != null then [
-        "-Wl,-L${libcCross.out}/lib"
-      ]
-      ++ (if crossStageStatic then [
-        "-B${libcCross.out}/lib"
-      ] else [
-        "-Wl,-rpath,${libcCross.out}/lib"
-        "-Wl,-rpath-link,${libcCross.out}/lib"
-      ])
-      ++ optionals (libpthreadCross != null) [
-        "-L${libpthreadCross}/lib"
-        "-Wl,${libpthreadCross.TARGET_LDFLAGS}"
-      ]
+    if cross != null && libcCross != null
+    then "-B${libcCross}/lib -Wl,-L${libcCross}/lib" +
+         (optionalString (libpthreadCross != null)
+           " -L${libpthreadCross}/lib -Wl,${libpthreadCross.TARGET_LDFLAGS}")
     else null;
 
   passthru =
diff --git a/pkgs/development/compilers/gcc/builder.sh b/pkgs/development/compilers/gcc/builder.sh
index 6b09cfd59ed..22107e72ef7 100644
--- a/pkgs/development/compilers/gcc/builder.sh
+++ b/pkgs/development/compilers/gcc/builder.sh
@@ -70,6 +70,10 @@ if test "$noSysDirs" = "1"; then
         # gcj in.
         unset LIBRARY_PATH
         unset CPATH
+        if test -z "$crossStageStatic"; then
+            EXTRA_TARGET_CFLAGS="-B${libcCross}/lib -idirafter ${libcCross}/include"
+            EXTRA_TARGET_LDFLAGS="-Wl,-L${libcCross}/lib -Wl,-rpath,${libcCross}/lib -Wl,-rpath-link,${libcCross}/lib"
+        fi
     else
         if test -z "$NIX_CC_CROSS"; then
             EXTRA_TARGET_CFLAGS="$EXTRA_FLAGS"
@@ -86,16 +90,15 @@ if test "$noSysDirs" = "1"; then
             extraFlags="$(cat $NIX_CC_CROSS/nix-support/libc-cflags)"
             extraLDFlags="$(cat $NIX_CC_CROSS/nix-support/libc-ldflags) $(cat $NIX_CC_CROSS/nix-support/libc-ldflags-before)"
 
-            # The path to the Glibc binaries such as `crti.o'.
-            glibc_dir="$(cat $NIX_CC_CROSS/nix-support/orig-libc)"
-            glibc_libdir="$glibc_dir/lib"
-            glibc_devdir="$(cat $NIX_CC_CROSS/nix-support/orig-libc-dev)"
-            configureFlags="$configureFlags --with-native-system-header-dir=$glibc_devdir/include"
-
             # Use *real* header files, otherwise a limits.h is generated
             # that does not include Glibc's limits.h (notably missing
             # SSIZE_MAX, which breaks the build).
-            NIX_FIXINC_DUMMY_CROSS="$glibc_devdir/include"
+            NIX_FIXINC_DUMMY_CROSS=$(cat $NIX_CC_CROSS/nix-support/orig-libc)/include
+
+            # The path to the Glibc binaries such as `crti.o'.
+            glibc_dir="$(cat $NIX_CC_CROSS/nix-support/orig-libc)"
+            glibc_libdir="$glibc_dir/lib"
+            configureFlags="$configureFlags --with-native-system-header-dir=$glibc_dir/include"
 
             extraFlags="-I$NIX_FIXINC_DUMMY_CROSS $extraFlags"
             extraLDFlags="-L$glibc_libdir -rpath $glibc_libdir $extraLDFlags"
diff --git a/pkgs/development/libraries/botan/generic.nix b/pkgs/development/libraries/botan/generic.nix
index 4a4ec5d9fe9..823e50e3227 100644
--- a/pkgs/development/libraries/botan/generic.nix
+++ b/pkgs/development/libraries/botan/generic.nix
@@ -2,7 +2,6 @@
 # Passed by version specific builders
 , baseVersion, revision, sha256
 , extraConfigureFlags ? ""
-, postPatch ? null
 , ...
 }:
 
@@ -18,7 +17,6 @@ stdenv.mkDerivation rec {
     ];
     inherit sha256;
   };
-  inherit postPatch;
 
   buildInputs = [ python bzip2 zlib gmp openssl boost ];
 
diff --git a/pkgs/development/libraries/botan/unstable.nix b/pkgs/development/libraries/botan/unstable.nix
index d952b50aeb8..dd185f21035 100644
--- a/pkgs/development/libraries/botan/unstable.nix
+++ b/pkgs/development/libraries/botan/unstable.nix
@@ -5,5 +5,4 @@ callPackage ./generic.nix (args // {
   revision = "29";
   sha256 = "157bp8716h17agrxyj7xpsj2i5sqhafj1nfx4gpzccx7y2kyq176";
   openssl = null;
-  postPatch = "sed '1i#include <cmath>' -i src/tests/test_bigint.cpp";
 })
diff --git a/pkgs/development/libraries/gettext/default.nix b/pkgs/development/libraries/gettext/default.nix
index 63eb086b0fb..78a8756b59b 100644
--- a/pkgs/development/libraries/gettext/default.nix
+++ b/pkgs/development/libraries/gettext/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     sed -i -e "s/\(am_libgettextlib_la_OBJECTS = \)error.lo/\\1/" gettext-tools/gnulib-lib/Makefile.in
   '';
 
-  nativeBuildInputs = [ xz xz.bin ] ++ stdenv.lib.optional (!stdenv.isLinux) libiconv; # HACK, see #10874 (and 14664)
+  buildInputs = [ xz xz.bin libiconv ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/glibc/builder.sh b/pkgs/development/libraries/glibc/builder.sh
new file mode 100644
index 00000000000..85f27c7b355
--- /dev/null
+++ b/pkgs/development/libraries/glibc/builder.sh
@@ -0,0 +1,58 @@
+# Glibc cannot have itself in its RPATH.
+export NIX_NO_SELF_RPATH=1
+
+source $stdenv/setup
+
+postConfigure() {
+    # Hack: get rid of the `-static' flag set by the bootstrap stdenv.
+    # This has to be done *after* `configure' because it builds some
+    # test binaries.
+    export NIX_CFLAGS_LINK=
+    export NIX_LDFLAGS_BEFORE=
+
+    export NIX_DONT_SET_RPATH=1
+    unset CFLAGS
+
+    # Apparently --bindir is not respected.
+    makeFlagsArray+=("bindir=$bin/bin" "sbindir=$bin/sbin" "rootsbindir=$bin/sbin")
+}
+
+postInstall() {
+    if test -n "$installLocales"; then
+        make -j${NIX_BUILD_CORES:-1} -l${NIX_BUILD_CORES:-1} localedata/install-locales
+    fi
+
+    test -f $out/etc/ld.so.cache && rm $out/etc/ld.so.cache
+
+    if test -n "$linuxHeaders"; then
+        # Include the Linux kernel headers in Glibc, except the `scsi'
+        # subdirectory, which Glibc provides itself.
+        (cd $dev/include && \
+         ln -sv $(ls -d $linuxHeaders/include/* | grep -v 'scsi$') .)
+    fi
+
+    # Fix for NIXOS-54 (ldd not working on x86_64).  Make a symlink
+    # "lib64" to "lib".
+    if test -n "$is64bit"; then
+        ln -s lib $out/lib64
+    fi
+
+    # Get rid of more unnecessary stuff.
+    rm -rf $out/var $out/sbin/sln
+
+    for i in $out/lib/*.a; do
+        strip -S "$i"
+    done
+    # Put libraries for static linking in a separate output.  Note
+    # that libc_nonshared.a and libpthread_nonshared.a are required
+    # for dynamically-linked applications.
+    mkdir -p $static/lib
+    mv $out/lib/*.a $static/lib
+    mv $static/lib/lib*_nonshared.a $out/lib
+
+    # Work around a Nix bug: hard links across outputs cause a build failure.
+    cp $bin/bin/getconf $bin/bin/getconf_
+    mv $bin/bin/getconf_ $bin/bin/getconf
+}
+
+genericBuild
diff --git a/pkgs/development/libraries/glibc/common.nix b/pkgs/development/libraries/glibc/common.nix
index e90fdc4ad7b..a189edb9832 100644
--- a/pkgs/development/libraries/glibc/common.nix
+++ b/pkgs/development/libraries/glibc/common.nix
@@ -54,7 +54,6 @@ stdenv.mkDerivation ({
       ./glob-simplify-interface.patch
       ./cve-2016-1234.patch
       ./cve-2016-3706.patch
-      ./fix_warnings.patch
     ];
 
   postPatch =
diff --git a/pkgs/development/libraries/glibc/default.nix b/pkgs/development/libraries/glibc/default.nix
index 0ea6b4b938b..80fc2ce1e93 100644
--- a/pkgs/development/libraries/glibc/default.nix
+++ b/pkgs/development/libraries/glibc/default.nix
@@ -17,21 +17,7 @@ in
     inherit lib stdenv fetchurl linuxHeaders installLocales
       profilingLibraries gccCross withGd gd libpng;
 
-    NIX_NO_SELF_RPATH = true;
-
-    postConfigure = ''
-      # Hack: get rid of the `-static' flag set by the bootstrap stdenv.
-      # This has to be done *after* `configure' because it builds some
-      # test binaries.
-      export NIX_CFLAGS_LINK=
-      export NIX_LDFLAGS_BEFORE=
-
-      export NIX_DONT_SET_RPATH=1
-      unset CFLAGS
-
-      # Apparently --bindir is not respected.
-      makeFlagsArray+=("bindir=$bin/bin" "sbindir=$bin/sbin" "rootsbindir=$bin/sbin")
-    '';
+    builder = ./builder.sh;
 
     # When building glibc from bootstrap-tools, we need libgcc_s at RPATH for
     # any program we run, because the gcc will have been placed at a new
@@ -40,7 +26,7 @@ in
     # Building from a proper gcc staying in the path where it was installed,
     # libgcc_s will not be at {gcc}/lib, and gcc's libgcc will be found without
     # any special hack.
-    preInstall = ''
+    preInstall = if cross != null then "" else ''
       if [ -f ${stdenv.cc.cc}/lib/libgcc_s.so.1 ]; then
           mkdir -p $out/lib
           cp ${stdenv.cc.cc}/lib/libgcc_s.so.1 $out/lib/libgcc_s.so.1
@@ -49,41 +35,6 @@ in
       fi
     '';
 
-    postInstall = ''
-      if test -n "$installLocales"; then
-          make -j''${NIX_BUILD_CORES:-1} -l''${NIX_BUILD_CORES:-1} localedata/install-locales
-      fi
-
-      test -f $out/etc/ld.so.cache && rm $out/etc/ld.so.cache
-
-      if test -n "$linuxHeaders"; then
-          # Include the Linux kernel headers in Glibc, except the `scsi'
-          # subdirectory, which Glibc provides itself.
-          (cd $dev/include && \
-           ln -sv $(ls -d $linuxHeaders/include/* | grep -v scsi\$) .)
-      fi
-
-      # Fix for NIXOS-54 (ldd not working on x86_64).  Make a symlink
-      # "lib64" to "lib".
-      if test -n "$is64bit"; then
-          ln -s lib $out/lib64
-      fi
-
-      # Get rid of more unnecessary stuff.
-      rm -rf $out/var $out/sbin/sln
-
-      # Put libraries for static linking in a separate output.  Note
-      # that libc_nonshared.a and libpthread_nonshared.a are required
-      # for dynamically-linked applications.
-      mkdir -p $static/lib
-      mv $out/lib/*.a $static/lib
-      mv $static/lib/lib*_nonshared.a $out/lib
-
-      # Work around a Nix bug: hard links across outputs cause a build failure.
-      cp $bin/bin/getconf $bin/bin/getconf_
-      mv $bin/bin/getconf_ $bin/bin/getconf
-    '';
-
     separateDebugInfo = true;
 
     meta.description = "The GNU C Library";
@@ -111,10 +62,6 @@ in
         dontStrip=1
       '';
 
-      preInstall = null; # clobber the native hook
-
-      separateDebugInfo = false; # this is currently broken for crossDrv
-
       # To avoid a dependency on the build system 'bash'.
       preFixup = ''
         rm $bin/bin/{ldd,tzselect,catchsegv,xtrace}
diff --git a/pkgs/development/libraries/glibc/fix_warnings.patch b/pkgs/development/libraries/glibc/fix_warnings.patch
deleted file mode 100644
index fd75c18c84e..00000000000
--- a/pkgs/development/libraries/glibc/fix_warnings.patch
+++ /dev/null
@@ -1,36 +0,0 @@
---- a/stdlib/setenv.c	2016-05-30 11:09:14.487180254 +0000
-+++ b/stdlib/setenv.c	2016-05-30 11:08:25.560390748 +0000
-@@ -277,6 +277,7 @@
- 
-   ep = __environ;
-   if (ep != NULL)
-+    {
-     while (*ep != NULL)
-       if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
- 	{
-@@ -290,6 +291,7 @@
- 	}
-       else
- 	++ep;
-+    }
- 
-   UNLOCK;
- 
---- a/nis/nis_call.c	2016-05-30 08:05:59.359855696 -0700
-+++ b/nis/nis_call.c	2016-05-30 08:05:55.679873221 -0700
-@@ -680,6 +680,7 @@
-   /* Choose which entry should be evicted from the cache.  */
-   loc = &nis_server_cache[0];
-   if (*loc != NULL)
-+    {
-     for (i = 1; i < 16; ++i)
-       if (nis_server_cache[i] == NULL)
- 	{
-@@ -690,6 +691,7 @@
- 	       || ((*loc)->uses == nis_server_cache[i]->uses
- 		   && (*loc)->expires > nis_server_cache[i]->expires))
- 	loc = &nis_server_cache[i];
-+    }
-   old = *loc;
-   *loc = new;
- 
diff --git a/pkgs/development/libraries/kerberos/krb5.nix b/pkgs/development/libraries/kerberos/krb5.nix
index 78644200e0b..332ca526b6b 100644
--- a/pkgs/development/libraries/kerberos/krb5.nix
+++ b/pkgs/development/libraries/kerberos/krb5.nix
@@ -26,8 +26,6 @@ stdenv.mkDerivation rec {
   buildInputs = [ openssl ]
     ++ optionals (!libOnly) [ openldap libedit ];
 
-  patches = [ ./path_char_fix.patch ];
-
   preConfigure = "cd ./src";
 
   buildPhase = optionalString libOnly ''
diff --git a/pkgs/development/libraries/kerberos/path_char_fix.patch b/pkgs/development/libraries/kerberos/path_char_fix.patch
deleted file mode 100644
index 2a6dc4c11c3..00000000000
--- a/pkgs/development/libraries/kerberos/path_char_fix.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-See https://github.com/krb5/krb5/pull/467
-diff --git a/src/include/Makefile.in b/src/include/Makefile.in
-index 4bb11e4..cb4b44b 100644
---- a/src/include/Makefile.in
-+++ b/src/include/Makefile.in
-@@ -57,19 +57,19 @@ SBINDIR = @sbindir@
- LIBDIR  = @libdir@
- SYSCONFCONF = @SYSCONFCONF@
- 
--PROCESS_REPLACE = -e "s+@KRB5RCTMPDIR+$(KRB5RCTMPDIR)+" \
--		  -e "s+@PREFIX+$(INSTALL_PREFIX)+" \
--		  -e "s+@EXEC_PREFIX+$(INSTALL_EXEC_PREFIX)+" \
--		  -e "s+@BINDIR+$(BINDIR)+" \
--		  -e "s+@LIBDIR+$(LIBDIR)+" \
--		  -e "s+@SBINDIR+$(SBINDIR)+" \
--		  -e "s+@MODULEDIR+$(MODULE_DIR)+" \
--		  -e "s+@GSSMODULEDIR+$(GSS_MODULE_DIR)+" \
--		  -e 's+@LOCALSTATEDIR+$(LOCALSTATEDIR)+' \
--		  -e 's+@RUNSTATEDIR+$(RUNSTATEDIR)+' \
--		  -e 's+@SYSCONFDIR+$(SYSCONFDIR)+' \
--		  -e 's+@DYNOBJEXT+$(DYNOBJEXT)+' \
--		  -e 's+@SYSCONFCONF+$(SYSCONFCONF)+'
-+PROCESS_REPLACE = -e "s\"@KRB5RCTMPDIR\"$(KRB5RCTMPDIR)\"" \
-+		  -e "s\"@PREFIX\"$(INSTALL_PREFIX)\"" \
-+		  -e "s\"@EXEC_PREFIX\"$(INSTALL_EXEC_PREFIX)\"" \
-+		  -e "s\"@BINDIR\"$(BINDIR)\"" \
-+		  -e "s\"@LIBDIR\"$(LIBDIR)\"" \
-+		  -e "s\"@SBINDIR\"$(SBINDIR)\"" \
-+		  -e "s\"@MODULEDIR\"$(MODULE_DIR)\"" \
-+		  -e "s\"@GSSMODULEDIR\"$(GSS_MODULE_DIR)\"" \
-+		  -e "s\"@LOCALSTATEDIR\"$(LOCALSTATEDIR)\"" \
-+		  -e "s\"@RUNSTATEDIR\"$(RUNSTATEDIR)\"" \
-+		  -e "s\"@SYSCONFDIR\"$(SYSCONFDIR)\"" \
-+		  -e "s\"@DYNOBJEXT\"$(DYNOBJEXT)\"" \
-+		  -e "s\"@SYSCONFCONF\"$(SYSCONFCONF)\""
- 
- OSCONFSRC = $(srcdir)/osconf.hin
- 
diff --git a/pkgs/development/libraries/libelf/default.nix b/pkgs/development/libraries/libelf/default.nix
index 12588617d4a..623256bb6b7 100644
--- a/pkgs/development/libraries/libelf/default.nix
+++ b/pkgs/development/libraries/libelf/default.nix
@@ -9,10 +9,10 @@ stdenv.mkDerivation rec {
   };
 
   doCheck = true;
-
+  
   # For cross-compiling, native glibc is needed for the "gencat" program.
   crossAttrs = {
-    nativeBuildInputs = [ gettext glibc ];
+    nativeBuildInputs = [ glibc ];
   };
 
   # Libelf's custom NLS macros fail to determine the catalog file extension on
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   # FIXME: Eventually make Gettext a build input on all platforms.
   configureFlags = stdenv.lib.optional stdenv.isDarwin "--disable-nls";
 
-  nativeBuildInputs = [ gettext ];
+  buildInputs = [ gettext ];
 
   meta = {
     description = "ELF object file access library";
diff --git a/pkgs/development/libraries/libxkbcommon/default.nix b/pkgs/development/libraries/libxkbcommon/default.nix
index 7087142a2aa..7cfccfe05f7 100644
--- a/pkgs/development/libraries/libxkbcommon/default.nix
+++ b/pkgs/development/libraries/libxkbcommon/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, yacc, flex, xkeyboard_config, libxcb, libX11 }:
+{ stdenv, fetchurl, pkgconfig, yacc, flex, xkeyboard_config, libxcb }:
 
 stdenv.mkDerivation rec {
   name = "libxkbcommon-0.6.1";
@@ -12,10 +12,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ pkgconfig yacc flex xkeyboard_config libxcb ];
 
-  configureFlags = [
-    "--with-xkb-config-root=${xkeyboard_config}/etc/X11/xkb"
-    "--with-x-locale-root=${libX11.out}/share/X11/locale"
-  ];
+  configureFlags = ''
+    --with-xkb-config-root=${xkeyboard_config}/etc/X11/xkb
+  '';
 
   preBuild = stdenv.lib.optionalString stdenv.isDarwin ''
     sed -i 's/,--version-script=.*$//' Makefile
diff --git a/pkgs/development/libraries/xgboost/default.nix b/pkgs/development/libraries/xgboost/default.nix
index 4ba366be56f..e3c5d757310 100644
--- a/pkgs/development/libraries/xgboost/default.nix
+++ b/pkgs/development/libraries/xgboost/default.nix
@@ -11,8 +11,6 @@ stdenv.mkDerivation rec {
     sha256 = "1d7lnbwxwakclqqfjwyk9w3wd2clkihdr6ljs5z08ydiaspri093";
   };
 
-  postPatch = "sed '1i#include <cmath>' -i src/tree/param.h";
-
   enableParallelBuilding = true;
 
   installPhase = ''
diff --git a/pkgs/development/python-modules/generic/wrap.sh b/pkgs/development/python-modules/generic/wrap.sh
index efbb1e73787..a67ea51f5a9 100644
--- a/pkgs/development/python-modules/generic/wrap.sh
+++ b/pkgs/development/python-modules/generic/wrap.sh
@@ -46,15 +46,16 @@ wrapPythonProgramsIn() {
                 # wrapProgram creates the executable shell script described
                 # above. The script will set PYTHONPATH and PATH variables.!
                 # (see pkgs/build-support/setup-hooks/make-wrapper.sh)
-                local -a wrap_args=("$f"
-                                 --prefix PYTHONPATH ':' "$program_PYTHONPATH"
-                                 --prefix PATH ':' "$program_PATH:$dir/bin")
+                local wrap_args="$f \
+                                 --prefix PYTHONPATH ':' $program_PYTHONPATH \
+                                 --prefix PATH ':' $program_PATH:$dir/bin"
 
                 # Add any additional arguments provided by makeWrapperArgs
                 # argument to buildPythonPackage.
-                local -a user_args="($makeWrapperArgs)"
-                local -a wrapProgramArgs=("${wrap_args[@]}" "${user_args[@]}")
-                wrapProgram "${wrapProgramArgs[@]}"
+                for arg in $makeWrapperArgs; do
+                    wrap_args="$wrap_args $arg"
+                done
+                wrapProgram $wrap_args
             fi
         fi
     done
diff --git a/pkgs/development/tools/analysis/rr/default.nix b/pkgs/development/tools/analysis/rr/default.nix
index 84ab79879b4..926aaeb94cc 100644
--- a/pkgs/development/tools/analysis/rr/default.nix
+++ b/pkgs/development/tools/analysis/rr/default.nix
@@ -11,9 +11,8 @@ stdenv.mkDerivation rec {
     sha256 = "03fl2wgbc1cilaw8hrhfqjsbpi05cid6k4cr3s2vmv5gx0dnrgy4";
   };
 
-  postPatch = ''
+  patchPhase = ''
     substituteInPlace src/Command.cc --replace '_BSD_SOURCE' '_DEFAULT_SOURCE'
-    sed '7i#include <math.h>' -i src/Scheduler.cc
     patchShebangs .
   '';
 
diff --git a/pkgs/development/tools/misc/hydra/default.nix b/pkgs/development/tools/misc/hydra/default.nix
index a4f1a96c6a4..510a0679527 100644
--- a/pkgs/development/tools/misc/hydra/default.nix
+++ b/pkgs/development/tools/misc/hydra/default.nix
@@ -3,7 +3,7 @@
 , gitAndTools, mercurial, darcs, subversion, bazaar, openssl, bzip2, libxslt
 , guile, perl, postgresql92, aws-sdk-cpp, nukeReferences, git, boehmgc
 , docbook_xsl, openssh, gnused, coreutils, findutils, gzip, lzma, gnutar
-, rpm, dpkg, cdrkit, fetchpatch }:
+, rpm, dpkg, cdrkit }:
 
 with stdenv;
 
@@ -70,12 +70,6 @@ in releaseTools.nixBuild rec {
     sha256 = "0ngipzm2i2vz5ygfd70hh82d027snpl85r8ncn1rxlkak0g8fxsl";
   };
 
-  patches = [(fetchpatch {
-    name = "cmath.diff";
-    url = https://github.com/vcunat/hydra/commit/3c6fca1ba299.diff; # https://github.com/NixOS/hydra/pull/337
-    sha256 = "02m9q304ay45s7xfkm2y7lppakrkx3hrq39mm6348isnbqmbarc0";
-  })];
-
   buildInputs =
     [ makeWrapper autoconf automake libtool unzip nukeReferences pkgconfig sqlite libpqxx
       gitAndTools.topGit mercurial darcs subversion bazaar openssl bzip2 libxslt
diff --git a/pkgs/games/cataclysm-dda/default.nix b/pkgs/games/cataclysm-dda/default.nix
index b46114ec62b..3956c994531 100644
--- a/pkgs/games/cataclysm-dda/default.nix
+++ b/pkgs/games/cataclysm-dda/default.nix
@@ -21,9 +21,6 @@ stdenv.mkDerivation rec {
     sed -i Makefile \
       -e 's,-Werror,,g' \
       -e 's,\(DATA_PREFIX=$(PREFIX)/share/\)cataclysm-dda/,\1,g'
-
-    sed '1i#include <cmath>' \
-      -i src/{crafting,skill,weather_data,melee,vehicle,overmap,iuse_actor}.cpp
   '';
 
   makeFlags = "PREFIX=$(out) LUA=1 TILES=1 SOUND=1 RELEASE=1 USE_HOME_DIR=1";
diff --git a/pkgs/games/dwarf-fortress/dfhack/default.nix b/pkgs/games/dwarf-fortress/dfhack/default.nix
index 1ee0f829571..3d3b1c4d9aa 100644
--- a/pkgs/games/dwarf-fortress/dfhack/default.nix
+++ b/pkgs/games/dwarf-fortress/dfhack/default.nix
@@ -39,7 +39,6 @@ in stdenv.mkDerivation rec {
   };
 
   patches = [ ./use-system-libraries.patch ];
-  postPatch = "sed '1i#include <math.h>' -i plugins/3dveins.cpp";
 
   nativeBuildInputs = [ cmake perl XMLLibXML XMLLibXSLT fakegit ];
   # we can't use native Lua; upstream uses private headers
diff --git a/pkgs/games/dwarf-fortress/unfuck.nix b/pkgs/games/dwarf-fortress/unfuck.nix
index 5b2327c2ff5..1d6ea1196da 100644
--- a/pkgs/games/dwarf-fortress/unfuck.nix
+++ b/pkgs/games/dwarf-fortress/unfuck.nix
@@ -13,8 +13,6 @@ stdenv.mkDerivation {
     sha256 = "12bqh3k4wsk1c0bz2zly8h0ilbsdmsbwr9cdjc6i7liwg9906g7i";
   };
 
-  postPatch = "sed '1i#include <math.h>' -i g_src/ttf_manager.cpp";
-
   cmakeFlags = [
     "-DGTK2_GLIBCONFIG_INCLUDE_DIR=${glib.out}/lib/glib-2.0/include"
     "-DGTK2_GDKCONFIG_INCLUDE_DIR=${gtk2.out}/lib/gtk-2.0/include"
diff --git a/pkgs/games/openspades/default.nix b/pkgs/games/openspades/default.nix
index 143fa21ce2e..2203bb6337e 100644
--- a/pkgs/games/openspades/default.nix
+++ b/pkgs/games/openspades/default.nix
@@ -16,11 +16,7 @@ stdenv.mkDerivation rec {
   postPatch = ''
     substituteInPlace Sources/Client/Client_Input.cpp --replace "isnan(" "std::isnan("
     substituteInPlace Sources/Client/Corpse.cpp --replace "isnan(" "std::isnan("
-    substituteInPlace Sources/Draw/SWMapRenderer.cpp \
-      --replace "isnan(" "std::isnan(" --replace "isinf(" "std::isinf("
-    sed '1i#include <cmath>' -i Sources/Client/{Player,Client_Input,Corpse}.cpp \
-      -i Sources/Draw/SWMapRenderer.cpp
-    sed '1i#include <math.h>' -i Sources/Draw/SWFeatureLevel.h
+    substituteInPlace Sources/Draw/SWMapRenderer.cpp --replace "isnan(" "std::isnan(" --replace "isinf(" "std::isinf("
   '';
 
   nativeBuildInputs = 
diff --git a/pkgs/games/openspades/git.nix b/pkgs/games/openspades/git.nix
index 7d76573f734..8212f160cda 100644
--- a/pkgs/games/openspades/git.nix
+++ b/pkgs/games/openspades/git.nix
@@ -14,8 +14,6 @@ stdenv.mkDerivation rec {
     sha256 = "0vyvmgim03q8pcmfa1i0njr4w1lpjq5g3b47f67v9b5c5jcjycwn";
   };
 
-  postPatch = "sed '1i#include <cmath>' -i Sources/Client/{,Client}Player.cpp";
-
   nativeBuildInputs = 
     with stdenv.lib;
     [ cmake curl glew makeWrapper mesa SDL2 SDL2_image unzip wget zlib ]
diff --git a/pkgs/games/the-butterfly-effect/default.nix b/pkgs/games/the-butterfly-effect/default.nix
index 68114bb7565..7cd54b1b65b 100644
--- a/pkgs/games/the-butterfly-effect/default.nix
+++ b/pkgs/games/the-butterfly-effect/default.nix
@@ -10,13 +10,10 @@ stdenv.mkDerivation rec {
     sha256 = "1ag2cp346f9bz9qy6za6q54id44d2ypvkyhvnjha14qzzapwaysj";
   };
 
-  postPatch = "sed '1i#include <vector>' -i src/model/World.h";
-
   buildInputs = [
     qt5.qtbase qt5.qtsvg qt5.qttranslations box2d which cmake
     gettext
   ];
-  enableParallelBuilding = true;
 
   installPhase = ''
     make DESTDIR=.. install
diff --git a/pkgs/misc/emulators/higan/default.nix b/pkgs/misc/emulators/higan/default.nix
index 77392913cb1..1395e3ac3ef 100644
--- a/pkgs/misc/emulators/higan/default.nix
+++ b/pkgs/misc/emulators/higan/default.nix
@@ -21,7 +21,6 @@ stdenv.mkDerivation rec {
   };
 
   patches = [ ./0001-change-flags.diff ];
-  postPatch = "sed '1i#include <cmath>' -i higan/fc/ppu/ppu.cpp";
 
   buildInputs =
   [ p7zip pkgconfig libX11 libXv udev mesa SDL libao openal libpulseaudio gtk gtksourceview ];
diff --git a/pkgs/misc/emulators/pcsx2/default.nix b/pkgs/misc/emulators/pcsx2/default.nix
index 673e4c3ed08..1b95bca643c 100644
--- a/pkgs/misc/emulators/pcsx2/default.nix
+++ b/pkgs/misc/emulators/pcsx2/default.nix
@@ -15,8 +15,6 @@ stdenv.mkDerivation rec {
     sha256 = "0s7mxq2cgzwjfsq0vhpz6ljk7wr725nxg48128iyirf85585l691";
   };
 
-  postPatch = "sed '1i#include \"x86intrin.h\"' -i common/src/x86emitter/cpudetect.cpp";
-
   configurePhase = ''
     mkdir -p build
     cd build
@@ -52,8 +50,6 @@ stdenv.mkDerivation rec {
     soundtouch wxGTK30 zlib
   ];
 
-  enableParallelBuilding = true;
-
   meta = with stdenv.lib; {
     description = "Playstation 2 emulator";
     longDescription= ''
diff --git a/pkgs/os-specific/linux/sysdig/default.nix b/pkgs/os-specific/linux/sysdig/default.nix
index 82e088b76c2..8296ec62c5b 100644
--- a/pkgs/os-specific/linux/sysdig/default.nix
+++ b/pkgs/os-specific/linux/sysdig/default.nix
@@ -18,9 +18,6 @@ stdenv.mkDerivation {
   src = fetchurl {
     inherit (s) url sha256;
   };
-  postPatch = ''
-    sed '1i#include <cmath>' -i userspace/libsinsp/{cursesspectro,filterchecks}.cpp
-  '';
 
   cmakeFlags = [
     "-DUSE_BUNDLED_DEPS=OFF"
diff --git a/pkgs/servers/nosql/arangodb/default.nix b/pkgs/servers/nosql/arangodb/default.nix
index 8b8d1ba0ae1..ffcd507653a 100644
--- a/pkgs/servers/nosql/arangodb/default.nix
+++ b/pkgs/servers/nosql/arangodb/default.nix
@@ -11,13 +11,6 @@ stdenv.mkDerivation rec {
     sha256 = "1v07fghf2jd2mvkfqhag0xblf6sxw7kx9kmhs2xpyrpns58lirvc";
   };
 
-  postPatch = ''
-    substituteInPlace 3rdParty/V8-3.31.74.1/build/gyp/gyp --replace /bin/bash ${bash}/bin/bash
-    substituteInPlace 3rdParty/etcd/build --replace /bin/bash ${bash}/bin/bash
-    sed '1i#include <cmath>' -i arangod/Aql/Functions.cpp \
-      -i lib/Basics/string-buffer.cpp
-  '';
-
   buildInputs = [
     openssl zlib python gyp go readline
   ];
@@ -26,6 +19,12 @@ stdenv.mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = "-Wno-error=strict-overflow";
 
+
+  patchPhase = ''
+    substituteInPlace 3rdParty/V8-3.31.74.1/build/gyp/gyp --replace /bin/bash ${bash}/bin/bash
+    substituteInPlace 3rdParty/etcd/build --replace /bin/bash ${bash}/bin/bash
+    '';
+
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
diff --git a/pkgs/stdenv/generic/setup.sh b/pkgs/stdenv/generic/setup.sh
index 5b50167d9b9..85e74461d2a 100644
--- a/pkgs/stdenv/generic/setup.sh
+++ b/pkgs/stdenv/generic/setup.sh
@@ -827,10 +827,6 @@ showPhaseHeader() {
 
 
 genericBuild() {
-    if [ -f "$buildCommandPath" ]; then
-        . "$buildCommandPath"
-        return
-    fi
     if [ -n "$buildCommand" ]; then
         eval "$buildCommand"
         return
diff --git a/pkgs/stdenv/linux/make-bootstrap-tools-cross.nix b/pkgs/stdenv/linux/make-bootstrap-tools-cross.nix
index 16099dfb3d3..d6e024c6258 100644
--- a/pkgs/stdenv/linux/make-bootstrap-tools-cross.nix
+++ b/pkgs/stdenv/linux/make-bootstrap-tools-cross.nix
@@ -5,7 +5,7 @@ let buildFor = toolsArch: (
 let
   pkgsFun = import ../../..;
   pkgsNoParams = pkgsFun {};
-
+  
   sheevaplugCrossSystem = {
     crossSystem = rec {
       config = "armv5tel-unknown-linux-gnueabi";
@@ -18,10 +18,10 @@ let
       openssl.system = "linux-generic32";
     };
   };
-
+  
   raspberrypiCrossSystem = {
     crossSystem = rec {
-      config = "armv6l-unknown-linux-gnueabi";
+      config = "armv6l-unknown-linux-gnueabi";  
       bigEndian = false;
       arch = "arm";
       float = "hard";
@@ -33,10 +33,10 @@ let
       inherit (platform) gcc;
     };
   };
-
+  
   armv7l-hf-multiplatform-crossSystem = {
     crossSystem = rec {
-      config = "armv7l-unknown-linux-gnueabi";
+      config = "armv7l-unknown-linux-gnueabi";  
       bigEndian = false;
       arch = "arm";
       float = "hard";
@@ -48,7 +48,7 @@ let
       inherit (platform) gcc;
     };
   };
-
+  
   selectedCrossSystem =
     if toolsArch == "armv5tel" then sheevaplugCrossSystem else
     if toolsArch == "armv6l" then raspberrypiCrossSystem else
@@ -91,13 +91,13 @@ rec {
   coreutilsMinimal = (pkgs.coreutils.override (args: {
     aclSupport = false;
   })).crossDrv;
-
+  
   curlMinimal = (pkgs.curl.override {
     zlibSupport = false;
     sslSupport = false;
     scpSupport = false;
   }).crossDrv;
-
+  
   busyboxMinimal = (pkgs.busybox.override {
     # TBD: uClibc is broken.
     # useUclibc = true;
@@ -113,10 +113,10 @@ rec {
       CONFIG_UNXZ y
     '';
   }).crossDrv;
-
+  
   inherit pkgs;
 
-  build =
+  build = 
 
     stdenv.mkDerivation {
       name = "build";
@@ -126,7 +126,7 @@ rec {
       crossConfig = stdenv.cross.config;
 
       buildCommand = ''
-	      set -x
+	set -x
         mkdir -p $out/bin $out/lib $out/libexec
 
         # Copy what we need of Glibc.
@@ -142,20 +142,20 @@ rec {
         cp -d ${glibc.out}/lib/libnss*.so* $out/lib
         cp -d ${glibc.out}/lib/libresolv*.so* $out/lib
         cp -d ${glibc.out}/lib/crt?.o $out/lib
-
+        
         cp -rL ${glibc.dev}/include $out
         chmod -R u+w $out/include
-
+        
         # Hopefully we won't need these.
         rm -rf $out/include/mtd $out/include/rdma $out/include/sound $out/include/video
         find $out/include -name .install -exec rm {} \;
         find $out/include -name ..install.cmd -exec rm {} \;
         mv $out/include $out/include-glibc
-
+        
         # Copy coreutils, bash, etc.
         cp ${coreutilsMinimal}/bin/* $out/bin
         (cd $out/bin && rm vdir dir sha*sum pinky factor pathchk runcon shuf who whoami shred users)
-
+        
         cp ${bash}/bin/bash $out/bin
         cp ${findutils}/bin/find $out/bin
         cp ${findutils}/bin/xargs $out/bin
@@ -174,7 +174,7 @@ rec {
         cp -d ${curlMinimal}/lib/libcurl* $out/lib
 
         cp -d ${gnugrep.pcre.crossDrv}/lib/libpcre*.so* $out/lib # needed by grep
-
+        
         # Copy what we need of GCC.
         cp -d ${gcc}/bin/gcc $out/bin
         cp -d ${gcc}/bin/cpp $out/bin
@@ -203,12 +203,12 @@ rec {
         cp -d ${libmpc}/lib/libmpc*.so* $out/lib
         cp -d ${zlib.out}/lib/libz.so* $out/lib
         cp -d ${libelf}/lib/libelf.so* $out/lib
-
+        
         # TBD: Why are these needed for cross but not native tools?
         cp -d ${cloogppl}/lib/libcloog*.so* $out/lib
         cp -d ${cloog}/lib/libcloog*.so* $out/lib
         cp -d ${isl}/lib/libisl*.so* $out/lib
-
+        
         # Copy binutils.
         for i in as ld ar ranlib nm strip readelf objdump; do
           cp ${binutils}/bin/$i $out/bin
@@ -216,7 +216,7 @@ rec {
         cp -d ${binutils.out}/lib/lib*.so* $out/lib
 
         chmod -R u+w $out
-
+        
         # Strip executables even further.
         for i in $out/bin/* $out/libexec/gcc/*/*/*; do
             if test -x $i -a ! -L $i; then
diff --git a/pkgs/tools/typesetting/xmlto/default.nix b/pkgs/tools/typesetting/xmlto/default.nix
index 37bc1831d5b..f99c1472076 100644
--- a/pkgs/tools/typesetting/xmlto/default.nix
+++ b/pkgs/tools/typesetting/xmlto/default.nix
@@ -1,12 +1,12 @@
 { fetchurl, stdenv, flex, libxml2, libxslt
-, docbook_xml_dtd_45, docbook_xsl, w3m
+, docbook_xml_dtd_42, docbook_xsl, w3m
 , bash, getopt, makeWrapper }:
 
 stdenv.mkDerivation rec {
-  name = "xmlto-0.0.28";
+  name = "xmlto-0.0.26";
   src = fetchurl {
     url = "http://fedorahosted.org/releases/x/m/xmlto/${name}.tar.bz2";
-    sha256 = "0xhj8b2pwp4vhl9y16v3dpxpsakkflfamr191mprzsspg4xdyc0i";
+    sha256 = "1v5mahfg5k9lh3anykl482xnrgxn36zlmqsgwahw29xwncprpd7g";
   };
 
   patchPhase = ''
@@ -20,8 +20,7 @@ stdenv.mkDerivation rec {
 
   # `libxml2' provides `xmllint', needed at build-time and run-time.
   # `libxslt' provides `xsltproc', used by `xmlto' at run-time.
-  nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ libxml2 libxslt docbook_xml_dtd_45 docbook_xsl getopt ];
+  buildInputs = [ libxml2 libxslt docbook_xml_dtd_42 docbook_xsl getopt makeWrapper ];
 
   postInstall = ''
     wrapProgram "$out/bin/xmlto" \