1 files changed, 5 insertions, 4 deletions
diff --git a/pkgs/development/libraries/haskell/pipes/default.nix b/pkgs/development/libraries/haskell/pipes/default.nix
index 87c173850f9b..a78028416076 100644
--- a/pkgs/development/libraries/haskell/pipes/default.nix
+++ b/pkgs/development/libraries/haskell/pipes/default.nix
@@ -1,13 +1,14 @@
-{ cabal, mmorph, transformers }:
+{ cabal, mmorph, mtl, transformers, void }:
 
 cabal.mkDerivation (self: {
   pname = "pipes";
-  version = "3.3.0";
-  sha256 = "1bgznfv7hxqwj5f7vkm8d41phw63bl2swzr0wrz0pcqxlr42likb";
-  buildDepends = [ mmorph transformers ];
+  version = "4.0.0";
+  sha256 = "0zsz739hjmfirwv9sacibpikwz48l006g95m8da1rqk5p1yyr2lm";
+  buildDepends = [ mmorph mtl transformers void ];
   meta = {
     description = "Compositional pipelines";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.ocharles ];
   };
 })