diff --git a/pkgs/development/libraries/haskell/atomic-primops/default.nix b/pkgs/development/libraries/haskell/atomic-primops/default.nix
index b542816f05b..9f1c2eedc66 100644
--- a/pkgs/development/libraries/haskell/atomic-primops/default.nix
+++ b/pkgs/development/libraries/haskell/atomic-primops/default.nix
@@ -1,10 +1,10 @@
-{ cabal, bitsAtomic, Cabal, primitive }:
+{ cabal, Cabal, primitive }:
 
 cabal.mkDerivation (self: {
   pname = "atomic-primops";
-  version = "0.4";
-  sha256 = "01sg0yn25fs0z7dmrvhyp3amay9l028xs570xhy6vvplrji1mxf0";
-  buildDepends = [ bitsAtomic Cabal primitive ];
+  version = "0.5";
+  sha256 = "0pni44gi9sh4l3hxwh7bqadhh6nc7v8w869sv9n45vkxwhhwbk4i";
+  buildDepends = [ Cabal primitive ];
   meta = {
     homepage = "https://github.com/rrnewton/haskell-lockfree-queue/wiki";
     description = "A safe approach to CAS and other atomic ops in Haskell";