diff --git a/pkgs/applications/version-management/darcs/default.nix b/pkgs/applications/version-management/darcs/default.nix
index ff5c3456e22..abfb20baff2 100644
--- a/pkgs/applications/version-management/darcs/default.nix
+++ b/pkgs/applications/version-management/darcs/default.nix
@@ -23,6 +23,9 @@ cabal.mkDerivation (self: {
     mkdir -p $out/etc/bash_completion.d
     mv contrib/darcs_completion $out/etc/bash_completion.d/darcs
   '';
+  patchPhase = ''
+    sed -i -e 's|random.*==.*|random|' darcs.cabal
+  '';
   meta = {
     homepage = "http://darcs.net/";
     description = "a distributed, interactive, smart revision control system";