diff --git a/pkgs/development/libraries/haskell/atomic-primops/default.nix b/pkgs/development/libraries/haskell/atomic-primops/default.nix
index c5bc0dd2b475..59d02ce76492 100644
--- a/pkgs/development/libraries/haskell/atomic-primops/default.nix
+++ b/pkgs/development/libraries/haskell/atomic-primops/default.nix
@@ -1,10 +1,10 @@
-{ cabal, Cabal, primitive }:
+{ cabal, primitive }:
 
 cabal.mkDerivation (self: {
   pname = "atomic-primops";
-  version = "0.6";
-  sha256 = "0jj4mv9vzk7s257gnjs00fza6shr7j9bv8p48gj61yncg0qdypiz";
-  buildDepends = [ Cabal primitive ];
+  version = "0.6.0.5";
+  sha256 = "0xyvadhmhk2b6y6p52cfbjx1hs3zfcwfa5wx6cypaq4yi3csyl5k";
+  buildDepends = [ primitive ];
   meta = {
     homepage = "https://github.com/rrnewton/haskell-lockfree/wiki";
     description = "A safe approach to CAS and other atomic ops in Haskell";