diff --git a/pkgs/development/coq-modules/CoLoR/default.nix b/pkgs/development/coq-modules/CoLoR/default.nix
index 3fac09277d1..c7aaf2a2e32 100644
--- a/pkgs/development/coq-modules/CoLoR/default.nix
+++ b/pkgs/development/coq-modules/CoLoR/default.nix
@@ -10,7 +10,10 @@ stdenv.mkDerivation {
 
   buildInputs = [ coq ];
   enableParallelBuilding = true;
-  installFlags = "COQLIB=$(out)/lib/coq/${coq.coq-version}/";
+
+  installPhase = ''
+    make -f Makefile.coq COQLIB=$out/lib/coq/${coq.coq-version}/ install
+  '';
 
   meta = with stdenv.lib; {
     homepage = http://color.inria.fr/;