diff --git a/pkgs/development/libraries/haskell/pipes-bytestring/default.nix b/pkgs/development/libraries/haskell/pipes-bytestring/default.nix
index 348847e6e9a..4fc5b1993a3 100644
--- a/pkgs/development/libraries/haskell/pipes-bytestring/default.nix
+++ b/pkgs/development/libraries/haskell/pipes-bytestring/default.nix
@@ -1,5 +1,4 @@
-{ cabal, pipes, pipesGroup, pipesParse, transformers
-}:
+{ cabal, pipes, pipesGroup, pipesParse, transformers }:
 
 cabal.mkDerivation (self: {
   pname = "pipes-bytestring";