diff --git a/pkgs/development/libraries/haskell/multiset/default.nix b/pkgs/development/libraries/haskell/multiset/default.nix
index 5850e0ce947..b8d4905dad9 100644
--- a/pkgs/development/libraries/haskell/multiset/default.nix
+++ b/pkgs/development/libraries/haskell/multiset/default.nix
@@ -1,11 +1,13 @@
-{cabal}:
+{cabal} :
 
 cabal.mkDerivation (self : {
   pname = "multiset";
-  version = "0.2";
-  sha256 = "35d76c026bab0dbdf761c8590297d718507bb9ef93c30bce4f524efee23f5323";
+  version = "0.2.1";
+  sha256 = "0snlm6s9ikf5gngdwb7rm7v6017f5bffajv6777y56pjmd7bk9sy";
   meta = {
-    description = "A variation of Data.Set. Multisets, sometimes also called bags, can contain multiple copies of the same key";
+    description = "The Data.MultiSet container type";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.stdenv.lib.platforms.haskellPlatforms;
+    maintainers = [ self.stdenv.lib.maintainers.simons ];
   };
 })
-