diff --git a/pkgs/development/libraries/haskell/unix-process-conduit/default.nix b/pkgs/development/libraries/haskell/unix-process-conduit/default.nix
index 1f04d939d9c..8470a2d3f82 100644
--- a/pkgs/development/libraries/haskell/unix-process-conduit/default.nix
+++ b/pkgs/development/libraries/haskell/unix-process-conduit/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "unix-process-conduit";
-  version = "0.2.2";
-  sha256 = "15n6n925avv51kr2avwkp8sq8mfl287i0445vl9iy6hyxjjgpgr6";
+  version = "0.2.2.1";
+  sha256 = "0zix8m38dza95g6ijip4r5nxz6y9vkh5jy8ksg4qpx1v2ib1m2cc";
   buildDepends = [ conduit filepath stm time transformers ];
   testDepends = [ conduit hspec transformers ];
   meta = {