treewide: drop conditional makeFlag for darwin when specifiying cross-compiler

pkgs/development/compilers/mosml/default.nix

@@ -6,7 +6,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ gmp perl ];
 
-  makeFlags = [ "PREFIX=$(out)" ] ++ lib.optionals stdenv.isDarwin [ "CC=${stdenv.cc.targetPrefix}cc" ];
+  makeFlags = [ "PREFIX=$(out)" "CC=${stdenv.cc.targetPrefix}cc" ];
 
   src = fetchurl {
     url = "https://github.com/kfl/mosml/archive/ver-${version}.tar.gz";

pkgs/games/crawl/default.nix

@@ -1,6 +1,6 @@
 { stdenv, lib, fetchFromGitHub, fetchpatch, which, sqlite, lua5_1, perl, python3, zlib, pkg-config, ncurses
 , dejavu_fonts, libpng, SDL2, SDL2_image, SDL2_mixer, libGLU, libGL, freetype, pngcrush, advancecomp
-, tileMode ? false, enableSound ? tileMode
+, tileMode ? false, enableSound ? tileMode, buildPackages
 
 # MacOS / Darwin builds
 , darwin ? null
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
 
   fontsPath = lib.optionalString tileMode dejavu_fonts;
 
-  makeFlags = [ "prefix=${placeholder "out"}" "FORCE_CC=${stdenv.cc.targetPrefix}cc" "FORCE_CXX=${stdenv.cc.targetPrefix}c++" "HOSTCXX=${stdenv.cc.targetPrefix}c++"
+  makeFlags = [ "prefix=${placeholder "out"}" "FORCE_CC=${stdenv.cc.targetPrefix}cc" "FORCE_CXX=${stdenv.cc.targetPrefix}c++" "HOSTCXX=${buildPackages.stdenv.cc.targetPrefix}c++"
                 "FORCE_PKGCONFIG=y"
                 "SAVEDIR=~/.crawl" "sqlite=${sqlite.dev}"
                 "DATADIR=${placeholder "out"}"

pkgs/tools/compression/hactool/default.nix

@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
     mv config.mk.template config.mk
   '';
 
-  makeFlags = lib.optionals stdenv.isDarwin [ "CC=${stdenv.cc.targetPrefix}cc" ];
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
   installPhase = ''
     install -D hactool $out/bin/hactool

pkgs/tools/networking/haproxy/default.nix

@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     "USE_GETADDRINFO=1"
   ] ++ lib.optionals withPrometheusExporter [
     "EXTRA_OBJS=contrib/prometheus-exporter/service-prometheus.o"
-  ] ++ lib.optional stdenv.isDarwin "CC=${stdenv.cc.targetPrefix}cc";
+  ] ++ [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
   enableParallelBuilding = true;
 

pkgs/tools/security/apg/default.nix

@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
   configurePhase = ''
     substituteInPlace Makefile --replace /usr/local "$out"
   '';
-  makeFlags = lib.optionals stdenv.isDarwin ["CC=${stdenv.cc.targetPrefix}cc"];
+  makeFlags = ["CC=${stdenv.cc.targetPrefix}cc"];
 
   patches = [
     ./apg.patch

pkgs/tools/text/boxes/default.nix

@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
                 "GLOBALCONF=${placeholder "out"}/share/boxes/boxes-config"
   '';
 
-  makeFlags = lib.optionals stdenv.isDarwin [ "CC=${stdenv.cc.targetPrefix}cc" ];
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
   installPhase = ''
     install -Dm755 -t $out/bin src/boxes