diff --git a/pkgs/applications/science/math/gfan/default.nix b/pkgs/applications/science/math/gfan/default.nix
index 05f09e4aedb3..9a9a1ff762f1 100644
--- a/pkgs/applications/science/math/gfan/default.nix
+++ b/pkgs/applications/science/math/gfan/default.nix
@@ -2,17 +2,16 @@
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
   pname = "gfan";
-  version = "0.5";
-  # or fetchFromGitHub(owner,repo,rev) or fetchgit(rev)
+  version = "0.6";
+
   src = fetchurl {
     url = "http://home.math.au.dk/jensen/software/gfan/gfan${version}.tar.gz";
-    sha256 = "0adk9pia683wf6kn6h1i02b3801jz8zn67yf39pl57md7bqbrsma";
+    sha256 = "02d6dvzfwy0lnidfgf98052jfqwy285nfm1h5nnx7jbgic1nnpgz";
   };
-  preBuild = ''
-    sed -e 's@static int i;@//&@' -i app_minkowski.cpp
-  '';
-  makeFlags = ''PREFIX=$(out)'';
+
+  makeFlags = ''PREFIX=$(out) CC=cc CXX=c++ cddnoprefix=1'';
   buildInputs = [gmp mpir cddlib];
+
   meta = {
     inherit version;
     description = ''A software package for computing Gröbner fans and tropical varieties'';