diff --git a/pkgs/development/tools/misc/gnum4/default.nix b/pkgs/development/tools/misc/gnum4/default.nix
index a0e231bf60a..5184b709e3d 100644
--- a/pkgs/development/tools/misc/gnum4/default.nix
+++ b/pkgs/development/tools/misc/gnum4/default.nix
@@ -1,8 +1 @@
-{stdenv, fetchurl}:
-stdenv.mkDerivation {
-  name = "gnum4-1.4.3";
-  src = fetchurl {
-    url = http://nix.cs.uu.nl/dist/tarballs/m4-1.4.3.tar.bz2;
-    md5 = "1f7d7eba70a0525c44c2edc3998925c7";
-  };
-}
+import ./m4-1.4.6.nix