coqPackages.ssreflect: inherit mathcomp's source/meta attributes

pkgs/development/coq-modules/mathcomp/default.nix

@@ -18,8 +18,11 @@ let param =
 
 in
 
-stdenv.mkDerivation {
-  name = "coq${coq.coq-version}-mathcomp-${param.version}";
+stdenv.mkDerivation rec {
+  name = "coq${coq.coq-version}-mathcomp-${version}";
+
+  # used in ssreflect
+  inherit (param) version;
 
   src = fetchFromGitHub {
     owner = "math-comp";
@@ -35,10 +38,11 @@ stdenv.mkDerivation {
 
   buildFlags = stdenv.lib.optionalString withDoc "doc";
 
+  COQBIN = "${coq}/bin/";
+
   preBuild = ''
     patchShebangs etc/utils/ssrcoqdep || true
     cd mathcomp
-    export COQBIN=${coq}/bin/
   '';
 
   installPhase = ''

pkgs/development/coq-modules/ssreflect/default.nix

@@ -1,40 +1,22 @@
-{ stdenv, fetchurl, coq, ncurses, which
-, graphviz, withDoc ? false
+{ stdenv, fetchFromGitHub, coq, ncurses, which
+, graphviz, mathcomp, withDoc ? false
 }:
 
-let param =
+stdenv.mkDerivation rec {
+  name = "coq${coq.coq-version}-ssreflect-${version}";
 
-  if stdenv.lib.versionAtLeast coq.coq-version "8.6" then
-  {
-    version = "1.7.0";
-    sha256 = "05zgyi4wmasi1rcyn5jq42w0bi9713q9m8dl1fdgl66nmacixh39";
-  }
-  else if stdenv.lib.versionAtLeast coq.coq-version "8.5" then
-  {
-    version = "1.6.1";
-    sha256 = "1j9ylggjzrxz1i2hdl2yhsvmvy5z6l4rprwx7604401080p5sgjw";
-  }
-  else throw "No version of SSReflect is available for Coq ${coq.coq-version}";
-
-in
-
-stdenv.mkDerivation {
-
-  name = "coq${coq.coq-version}-ssreflect-${param.version}";
-  src = fetchurl {
-    url = "https://github.com/math-comp/math-comp/archive/mathcomp-${param.version}.tar.gz";
-    inherit (param) sha256;
-  };
+  inherit (mathcomp) src version meta;
 
   nativeBuildInputs = stdenv.lib.optionals withDoc [ graphviz ];
   buildInputs = [ coq ncurses which ] ++ (with coq.ocamlPackages; [ ocaml findlib camlp5 ]);
 
   enableParallelBuilding = true;
 
+  COQBIN = "${coq}/bin/";
+
   preBuild = ''
     patchShebangs etc/utils/ssrcoqdep || true
     cd mathcomp/ssreflect
-    export COQBIN=${coq}/bin/
   '';
 
   installPhase = ''
@@ -46,15 +28,5 @@ stdenv.mkDerivation {
     cp -r html $out/share/doc/coq/${coq.coq-version}/user-contrib/mathcomp/ssreflect/
   '';
 
-  meta = with stdenv.lib; {
-    homepage = http://ssr.msr-inria.inria.fr/;
-    license = licenses.cecill-b;
-    maintainers = with maintainers; [ vbgl jwiegley ];
-    inherit (coq.meta) platforms;
-  };
-
-  passthru = {
-    compatibleCoqVersions = v: stdenv.lib.versionAtLeast v "8.5";
-  };
-
+  passthru.compatibleCoqVersions = mathcomp.compatibleCoqVersions;
 }