ocamlPackages.*: remove unnecessary unpackCmd

6 years ago · 208aedb971
parent 3ec657ab0c
commit 208aedb971
48 changed files with 7 additions and 94 deletions
--- a/doc/languages-frameworks/ocaml.xml
+++ b/doc/languages-frameworks/ocaml.xml
@ -67,9 +67,9 @@ buildDunePackage rec {

 <para>
   Here is a second example, this time using a source archive generated with
-   <literal>dune-release</literal>. The <literal>unpackCmd</literal>
-   redefinition is necessary to be able to unpack the kind of tarball that
-   <literal>dune-release</literal> generates. This library does not depend
+   <literal>dune-release</literal>. It is a good idea to use this archive when
+   it is available as it will usually contain substituted variables such as a
+   <literal>%%VERSION%%</literal> field. This library does not depend
   on any other OCaml library and no tests are run after building it.
 </para>

@ -87,8 +87,6 @@ buildDunePackage rec {
    sha256 = "1msg3vycd3k8qqj61sc23qks541cxpb97vrnrvrhjnqxsqnh6ygq";
  };

-  unpackCmd = "tar xjf $src";
-
  meta = with stdenv.lib; {
    homepage = https://github.com/flowtype/ocaml-wtf8;
    description = "WTF-8 is a superset of UTF-8 that allows unpaired surrogates.";
--- a/pkgs/development/ocaml-modules/astring/default.nix
+++ b/pkgs/development/ocaml-modules/astring/default.nix
@ -9,8 +9,6 @@ stdenv.mkDerivation rec {
    sha256 = "0ixjwc3plrljvj24za3l9gy0w30lsbggp8yh02lwrzw61ls4cri0";
  };

-  unpackCmd = "tar -xf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ];

  inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/bos/default.nix
+++ b/pkgs/development/ocaml-modules/bos/default.nix
@ -10,8 +10,6 @@ stdenv.mkDerivation rec {
 		sha256 = "1s10iqx8rgnxr5n93lf4blwirjf8nlm272yg5sipr7lsr35v49wc";
 	};

-	unpackCmd = "tar xjf $src";
-
 	buildInputs = [ ocaml findlib ocamlbuild topkg ];
 	propagatedBuildInputs = [ astring fmt fpath logs rresult ];

--- a/pkgs/development/ocaml-modules/cmdliner/default.nix
+++ b/pkgs/development/ocaml-modules/cmdliner/default.nix
@ -15,8 +15,6 @@ stdenv.mkDerivation rec {
    sha256 = "18jqphjiifljlh9jg8zpl6310p3iwyaqphdkmf89acyaix0s4kj1";
  };

-  unpackCmd = "tar xjf $src";
-
  nativeBuildInputs = [ ocamlbuild topkg ];
  buildInputs = [ ocaml findlib ];
  propagatedBuildInputs = [ result ];
--- a/pkgs/development/ocaml-modules/cpuid/default.nix
+++ b/pkgs/development/ocaml-modules/cpuid/default.nix
@ -8,8 +8,6 @@ stdenv.mkDerivation {
    sha256 = "08k2558a3dnxn8msgpz8c93sfn0y027ganfdi2yvql0fp1ixv97p";
  };

-  unpackCmd = "tar xjf $src";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ocb-stubblr ];

  inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/cstruct/default.nix
+++ b/pkgs/development/ocaml-modules/cstruct/default.nix
@ -9,8 +9,6 @@ buildDunePackage rec {
    sha256 = "1x4jxsvd1lrfibnjdjrkfl7hqsc48rljnwbap6faanj9qhwwa6v2";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  propagatedBuildInputs = [ sexplib ocplib-endian ];

  meta = {
--- a/pkgs/development/ocaml-modules/cstruct/lwt.nix
+++ b/pkgs/development/ocaml-modules/cstruct/lwt.nix
@ -2,7 +2,7 @@

 buildDunePackage {
 	pname = "cstruct-lwt";
-	inherit (cstruct) version src unpackCmd meta;
+	inherit (cstruct) version src meta;

  minimumOCamlVersion = "4.02";

--- a/pkgs/development/ocaml-modules/cstruct/ppx.nix
+++ b/pkgs/development/ocaml-modules/cstruct/ppx.nix
@ -2,7 +2,7 @@

 buildDunePackage {
 	pname = "ppx_cstruct";
-	inherit (cstruct) version src unpackCmd meta;
+	inherit (cstruct) version src meta;

  minimumOCamlVersion = "4.02";

--- a/pkgs/development/ocaml-modules/cstruct/unix.nix
+++ b/pkgs/development/ocaml-modules/cstruct/unix.nix
@ -2,7 +2,7 @@

 buildDunePackage {
 	pname = "cstruct-unix";
-	inherit (cstruct) version src unpackCmd meta;
+	inherit (cstruct) version src meta;

  minimumOCamlVersion = "4.02";

--- a/pkgs/development/ocaml-modules/csv/default.nix
+++ b/pkgs/development/ocaml-modules/csv/default.nix
@ -9,8 +9,6 @@ buildDunePackage rec {
 		sha256 = "0cgfb6cwhwy7ypc1i3jyfz6sdnykp75aqi6kk0g1a2d81yjwzbcg";
 	};

-	unpackCmd = "tar -xjf $src";
-
 	meta = {
 		description = "A pure OCaml library to read and write CSV files";
 		license = stdenv.lib.licenses.lgpl21;
--- a/pkgs/development/ocaml-modules/digestif/default.nix
+++ b/pkgs/development/ocaml-modules/digestif/default.nix
@ -13,8 +13,6 @@ stdenv.mkDerivation rec {
    sha256 = "0fsyfi5ps17j3wjav5176gf6z3a5xcw9aqhcr1gml9n9ayfbkhrd";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ];

  inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/dtoa/default.nix
+++ b/pkgs/development/ocaml-modules/dtoa/default.nix
@ -11,8 +11,6 @@ buildDunePackage rec {
    sha256 = "0rzysj07z2q6gk0yhjxnjnba01vmdb9x32wwna10qk3rrb8r2pnn";
  };

-  unpackCmd = "tar xjf $src";
-
  hardeningDisable = stdenv.lib.optional stdenv.isDarwin "strictoverflow";

  meta = with stdenv.lib; {
--- a/pkgs/development/ocaml-modules/farfadet/default.nix
+++ b/pkgs/development/ocaml-modules/farfadet/default.nix
@ -15,8 +15,6 @@ stdenv.mkDerivation rec {
    sha256 = "06wvd57c8khpq0c2hvm15zng269zvabsw1lcaqphqdcckl67nsxr";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ];

  propagatedBuildInputs = [ faraday ];
@ -31,4 +29,3 @@ stdenv.mkDerivation rec {
    inherit (ocaml.meta) platforms;
  };
 }
-
--- a/pkgs/development/ocaml-modules/fmt/default.nix
+++ b/pkgs/development/ocaml-modules/fmt/default.nix
@ -8,8 +8,6 @@ stdenv.mkDerivation {
    sha256 = "1zj9azcxcn6skmb69ykgmi9z8c50yskwg03wqgh87lypgjdcz060";
  };

-  unpackCmd = "tar xjf $src";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg cmdliner ];
  propagatedBuildInputs = [ result uchar ];

--- a/pkgs/development/ocaml-modules/fpath/default.nix
+++ b/pkgs/development/ocaml-modules/fpath/default.nix
@ -7,8 +7,6 @@ stdenv.mkDerivation {
    sha256 = "1hr05d8bpqmqcfdavn4rjk9rxr7v2zl84866f5knjifrm60sxqic";
  };

-  unpackCmd = "tar xjf $src";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ];

  propagatedBuildInputs = [ astring ];
--- a/pkgs/development/ocaml-modules/functoria/default.nix
+++ b/pkgs/development/ocaml-modules/functoria/default.nix
@ -13,8 +13,6 @@ stdenv.mkDerivation rec {
 		sha256 = "019rl4rir4lwgjyqj2wq3ylw4daih1kxxgbc6ld6kzcq66mwr747";
 	};

-	unpackCmd = "tar xjf $src";
-
 	buildInputs = [ ocaml findlib ocamlbuild topkg ];
 	propagatedBuildInputs = [ bos cmdliner ocamlgraph ];

--- a/pkgs/development/ocaml-modules/gg/default.nix
+++ b/pkgs/development/ocaml-modules/gg/default.nix
@ -23,8 +23,6 @@ stdenv.mkDerivation rec {

  createFindlibDestdir = true;

-  unpackCmd = "tar xjf $src";
-
  buildPhase = "ocaml pkg/build.ml native=true native-dynlink=true";

  installPhase = "opaline -libdir $OCAMLFIND_DESTDIR";
--- a/pkgs/development/ocaml-modules/hex/default.nix
+++ b/pkgs/development/ocaml-modules/hex/default.nix
@ -11,8 +11,6 @@ buildDunePackage rec {
    sha256 = "17hqf7z5afp2z2c55fk5myxkm7cm74259rqm94hcxkqlpdaqhm8h";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  propagatedBuildInputs = [ cstruct ];
  doCheck = true;

--- a/pkgs/development/ocaml-modules/integers/default.nix
+++ b/pkgs/development/ocaml-modules/integers/default.nix
@ -8,8 +8,6 @@ stdenv.mkDerivation {
 		sha256 = "08b1ljw88ny3l0mdq6xmffjk8anfc77igryva5jz1p6f4f746ywk";
 	};

-	unpackCmd = "tar xjf $src";
-
 	buildInputs = [ ocaml findlib ocamlbuild topkg ];

 	inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/jsonm/default.nix
+++ b/pkgs/development/ocaml-modules/jsonm/default.nix
@ -13,8 +13,6 @@ stdenv.mkDerivation {
  buildInputs = [ ocaml findlib ocamlbuild topkg ];
  propagatedBuildInputs = [ uutf ];

-  unpackCmd = "tar xjf $src";
-
  inherit (topkg) buildPhase installPhase;

  meta = {
--- a/pkgs/development/ocaml-modules/logs/default.nix
+++ b/pkgs/development/ocaml-modules/logs/default.nix
@ -16,8 +16,6 @@ stdenv.mkDerivation rec {
    sha256 = "1khbn7jqpid83zn8rvyh1x1sirls7zc878zj4fz985m5xlsfy853";
  };

-  unpackCmd = "tar xjf $src";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg fmt cmdliner lwt ];
  propagatedBuildInputs = [ result ];

--- a/pkgs/development/ocaml-modules/lru/default.nix
+++ b/pkgs/development/ocaml-modules/lru/default.nix
@ -9,8 +9,6 @@ stdenv.mkDerivation rec {
    sha256 = "0bd7js9rrma1fjjjjc3fgr9l5fjbhgihx2nsaf96g2b35iiaimd0";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ];

  propagatedBuildInputs = [ psq ];
--- a/pkgs/development/ocaml-modules/mtime/default.nix
+++ b/pkgs/development/ocaml-modules/mtime/default.nix
@ -23,8 +23,6 @@ stdenv.mkDerivation {
    inherit (param) sha256;
  };

-  unpackCmd = "tar xjf $src";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ]
  ++ stdenv.lib.optional jsooSupport js_of_ocaml;

--- a/pkgs/development/ocaml-modules/nocrypto/default.nix
+++ b/pkgs/development/ocaml-modules/nocrypto/default.nix
@ -16,8 +16,6 @@ stdenv.mkDerivation rec {
    sha256 = "0zshi9hlhcz61n5z1k6fx6rsi0pl4xgahsyl2jp0crqkaf3hqwlg";
  };

-  unpackCmd = "tar xjf $curSrc";
-
  patches = [
    (fetchpatch {
      url = "https://raw.githubusercontent.com/ocaml/opam-repository/master/packages/nocrypto/nocrypto.0.5.4-1/files/0001-add-missing-runtime-dependencies-in-_tags.patch";
--- a/pkgs/development/ocaml-modules/notty/default.nix
+++ b/pkgs/development/ocaml-modules/notty/default.nix
@ -19,8 +19,6 @@ stdenv.mkDerivation rec {
    sha256 = "0wdfmgx1mz77s7m451vy8r9i4iqwn7s7b39kpbpckf3w9417riq0";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ocb-stubblr ];
  propagatedBuildInputs = [ result uucp uuseg uutf ] ++
                          optional withLwt lwt;
--- a/pkgs/development/ocaml-modules/octavius/default.nix
+++ b/pkgs/development/ocaml-modules/octavius/default.nix
@ -10,8 +10,6 @@ stdenv.mkDerivation {
 		sha256 = "02milzzlr4xk5aymg2fjz27f528d5pyscqvld3q0dm41zcpkz5ml";
 	};

-	unpackCmd = "tar xjf $src";
-
 	buildInputs = [ ocaml findlib ocamlbuild topkg ];

 	inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/otfm/default.nix
+++ b/pkgs/development/ocaml-modules/otfm/default.nix
@ -21,8 +21,6 @@ stdenv.mkDerivation rec {

  propagatedBuildInputs = [ uutf result ];

-  unpackCmd = "tar xjf $src";
-
  inherit (topkg) buildPhase installPhase;

  meta = with stdenv.lib; {
--- a/pkgs/development/ocaml-modules/ppx_blob/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_blob/default.nix
@ -9,8 +9,6 @@ buildDunePackage rec {
    sha256 = "1xmslk1mwdzhy1bydgsjlcb7h544c39hvxa8lywp8w72gaggjl16";
  };

-  unpackCmd = "tar xjf $curSrc";
-
  buildInputs = [ alcotest ocaml-migrate-parsetree ];
  doCheck = true;

--- a/pkgs/development/ocaml-modules/ppx_gen_rec/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_gen_rec/default.nix
@ -11,8 +11,6 @@ buildDunePackage rec {
    sha256 = "0qy0wa3rd5yh1612jijadi1yddfslpsmmmf69phi2dhr3vmkhza7";
  };

-  unpackCmd = "tar xjf $src";
-
  buildInputs = [ ocaml-migrate-parsetree ];

  meta = with stdenv.lib; {
--- a/pkgs/development/ocaml-modules/psq/default.nix
+++ b/pkgs/development/ocaml-modules/psq/default.nix
@ -13,8 +13,6 @@ stdenv.mkDerivation rec {
    sha256 = "08ghgdivbjrxnaqc3hsb69mr9s2ql5ds0fb97b7z6zimzqibz6lp";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ];

  inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/ptime/default.nix
+++ b/pkgs/development/ocaml-modules/ptime/default.nix
@ -9,8 +9,6 @@ stdenv.mkDerivation rec {
    sha256 = "0z2snhda8bg136xkw2msw6k2dz84vb49p8bgzrxfs8mawdlk0kkg";
  };

-  unpackCmd = "tar -xf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg js_of_ocaml ];

  propagatedBuildInputs = [ result ];
--- a/pkgs/development/ocaml-modules/react/default.nix
+++ b/pkgs/development/ocaml-modules/react/default.nix
@ -8,7 +8,6 @@ stdenv.mkDerivation {
    sha256 = "1aj8w79gdd9xnrbz7s5p8glcb4pmimi8jp9f439dqnf6ih3mqb3v";
  };

-  unpackCmd = "tar xjf $src";
  buildInputs = [ ocaml findlib topkg ocamlbuild ];

  inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/rope/default.nix
+++ b/pkgs/development/ocaml-modules/rope/default.nix
@ -8,7 +8,6 @@ let param =
    sha256 = "06pkbnkad2ck50jn59ggwv154yd9vb01abblihvam6p27m4za1pc";
    buildInputs = [ dune ];
    extra = {
-      unpackCmd = "tar -xjf $curSrc";
      buildPhase = "dune build -p rope";
      inherit (dune) installPhase;
    };
--- a/pkgs/development/ocaml-modules/rresult/default.nix
+++ b/pkgs/development/ocaml-modules/rresult/default.nix
@ -8,8 +8,6 @@ stdenv.mkDerivation rec {
 		sha256 = "1k69a3gvrk7f2cshwjzvk7818f0bwxhacgd14wxy6d4gmrggci86";
 	};

-	unpackCmd = "tar xjf $src";
-
 	buildInputs = [ ocaml findlib ocamlbuild topkg ];

 	inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/topkg/default.nix
+++ b/pkgs/development/ocaml-modules/topkg/default.nix
@ -32,7 +32,6 @@ stdenv.mkDerivation rec {
  buildInputs = [ ocaml findlib ocamlbuild ];
  propagatedBuildInputs = [ result ];

-  unpackCmd = "tar xjf ${src}";
  buildPhase = "${run} build";
  createFindlibDestdir = true;
  installPhase = "${opaline}/bin/opaline -prefix $out -libdir $OCAMLFIND_DESTDIR";
--- a/pkgs/development/ocaml-modules/tsdl/default.nix
+++ b/pkgs/development/ocaml-modules/tsdl/default.nix
@ -22,8 +22,6 @@ stdenv.mkDerivation {
  buildInputs = [ ocaml findlib ocamlbuild topkg result ocb-stubblr ];
  propagatedBuildInputs = [ SDL2 ctypes ];

-  unpackCmd = "tar xjf $src";
-
  preConfigure = ''
    # The following is done to avoid an additional dependency (ncurses)
    # due to linking in the custom bytecode runtime. Instead, just
--- a/pkgs/development/ocaml-modules/uchar/default.nix
+++ b/pkgs/development/ocaml-modules/uchar/default.nix
@ -8,7 +8,6 @@ stdenv.mkDerivation {
    sha256 = "1w2saw7zanf9m9ffvz2lvcxvlm118pws2x1wym526xmydhqpyfa7";
  };

-  unpackCmd = "tar xjf $src";
  buildInputs = [ ocaml ocamlbuild findlib opaline ];
  buildPhase = "ocaml pkg/build.ml native=true native-dynlink=true";
  installPhase = "opaline -libdir $OCAMLFIND_DESTDIR";
--- a/pkgs/development/ocaml-modules/uri/default.nix
+++ b/pkgs/development/ocaml-modules/uri/default.nix
@ -11,8 +11,6 @@ buildDunePackage rec {
    sha256 = "1m845rwd70wi4iijkrigyz939m1x84ba70hvv0d9sgk6971w4kz0";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  buildInputs = [ ounit ];
  propagatedBuildInputs = [ ppx_sexp_conv re sexplib stringext ];
  doCheck = true;
--- a/pkgs/development/ocaml-modules/uucd/default.nix
+++ b/pkgs/development/ocaml-modules/uucd/default.nix
@ -15,8 +15,6 @@ stdenv.mkDerivation rec {

  buildInputs = [ ocaml findlib ocamlbuild topkg ];

-  unpackCmd = "tar xjf $src";
-
  inherit (topkg) buildPhase installPhase;

  propagatedBuildInputs = [ xmlm ];
--- a/pkgs/development/ocaml-modules/uucp/default.nix
+++ b/pkgs/development/ocaml-modules/uucp/default.nix
@ -21,8 +21,6 @@ stdenv.mkDerivation {

  propagatedBuildInputs = [ uchar ];

-  unpackCmd = "tar xjf $src";
-
  buildPhase = "${topkg.buildPhase} --with-cmdliner false";

  inherit (topkg) installPhase;
--- a/pkgs/development/ocaml-modules/uuidm/default.nix
+++ b/pkgs/development/ocaml-modules/uuidm/default.nix
@ -2,14 +2,12 @@

 stdenv.mkDerivation rec {
  version = "0.9.6";
-  name = "uuidm-${version}"; 
+  name = "uuidm-${version}";
  src = fetchurl {
    url = "http://erratique.ch/software/uuidm/releases/uuidm-${version}.tbz";
    sha256 = "0hz4fdx0x16k0pw9995vkz5d1hmzz6b16wck9li399rcbfnv5jlc";
  };

-  unpackCmd = "tar -xf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg cmdliner ];

  inherit (topkg) buildPhase installPhase;
--- a/pkgs/development/ocaml-modules/uunf/default.nix
+++ b/pkgs/development/ocaml-modules/uunf/default.nix
@ -19,8 +19,6 @@ stdenv.mkDerivation rec {

  propagatedBuildInputs = [ uchar ];

-  unpackCmd = "tar xjf $src";
-
  inherit (topkg) buildPhase installPhase;

  meta = with stdenv.lib; {
--- a/pkgs/development/ocaml-modules/uuseg/default.nix
+++ b/pkgs/development/ocaml-modules/uuseg/default.nix
@ -18,8 +18,6 @@ stdenv.mkDerivation rec {
  buildInputs = [ ocaml findlib ocamlbuild cmdliner topkg uutf ];
  propagatedBuildInputs = [ uucp uchar ];

-  unpackCmd = "tar xjf $src";
-
  inherit (topkg) buildPhase installPhase;

  meta = with stdenv.lib; {
--- a/pkgs/development/ocaml-modules/uutf/default.nix
+++ b/pkgs/development/ocaml-modules/uutf/default.nix
@ -16,8 +16,6 @@ stdenv.mkDerivation rec {
  buildInputs = [ ocaml findlib ocamlbuild topkg cmdliner ];
  propagatedBuildInputs = [ uchar ];

-  unpackCmd = "tar xjf $src";
-
  inherit (topkg) buildPhase installPhase;

  meta = with stdenv.lib; {
--- a/pkgs/development/ocaml-modules/vg/default.nix
+++ b/pkgs/development/ocaml-modules/vg/default.nix
@ -32,8 +32,6 @@ stdenv.mkDerivation rec {
                          ++ optionals pdfBackend [ uutf otfm ]
                          ++ optionals htmlcBackend [ js_of_ocaml js_of_ocaml-ocamlbuild js_of_ocaml-ppx ];

-  unpackCmd = "tar xjf $src";
-
  buildPhase = topkg.buildPhase
    + " --with-uutf ${boolToString pdfBackend}"
    + " --with-otfm ${boolToString pdfBackend}"
--- a/pkgs/development/ocaml-modules/wtf8/default.nix
+++ b/pkgs/development/ocaml-modules/wtf8/default.nix
@ -11,8 +11,6 @@ buildDunePackage rec {
    sha256 = "1msg3vycd3k8qqj61sc23qks541cxpb97vrnrvrhjnqxsqnh6ygq";
  };

-  unpackCmd = "tar xjf $src";
-
  meta = with stdenv.lib; {
    homepage = https://github.com/flowtype/ocaml-wtf8;
    description = "WTF-8 is a superset of UTF-8 that allows unpaired surrogates.";
--- a/pkgs/development/ocaml-modules/x509/default.nix
+++ b/pkgs/development/ocaml-modules/x509/default.nix
@ -12,8 +12,6 @@ stdenv.mkDerivation rec {
    sha256 = "1c62mw9rnzq0rs3ihbhfs18nv4mdzwag7893hlqgji3wmaai70pk";
  };

-  unpackCmd = "tar -xjf $curSrc";
-
  buildInputs = [ ocaml findlib ocamlbuild topkg ppx_sexp_conv ounit cstruct-unix ];
  propagatedBuildInputs = [ asn1-combinators astring nocrypto ];

--- a/pkgs/development/ocaml-modules/xmlm/default.nix
+++ b/pkgs/development/ocaml-modules/xmlm/default.nix
@ -19,8 +19,6 @@ stdenv.mkDerivation rec {

  buildInputs = [ ocaml findlib ocamlbuild topkg ];

-  unpackCmd = "tar xjf $src";
-
  inherit (topkg) buildPhase installPhase;

  meta = with stdenv.lib; {