diff --git a/pkgs/development/libraries/haskell/cmdargs/default.nix b/pkgs/development/libraries/haskell/cmdargs/default.nix
index ba8793ebb45..1bd39a387bb 100644
--- a/pkgs/development/libraries/haskell/cmdargs/default.nix
+++ b/pkgs/development/libraries/haskell/cmdargs/default.nix
@@ -7,6 +7,7 @@ cabal.mkDerivation (self: {
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ filepath transformers ];
+  patchPhase = "touch cmdargs.cabal";
   meta = {
     homepage = "http://community.haskell.org/~ndm/cmdargs/";
     description = "Command line argument processing";