diff --git a/pkgs/development/libraries/haskell/hashtables/default.nix b/pkgs/development/libraries/haskell/hashtables/default.nix
index f8f382e8bd1c..ddccebeb48d8 100644
--- a/pkgs/development/libraries/haskell/hashtables/default.nix
+++ b/pkgs/development/libraries/haskell/hashtables/default.nix
@@ -1,11 +1,15 @@
 # This file was auto-generated by cabal2nix. Please do NOT edit manually!
 
-{ cabal, hashable, primitive, vector }:
+{ cabal, fetchgit, hashable, primitive, vector }:
 
 cabal.mkDerivation (self: {
   pname = "hashtables";
-  version = "1.2.0.0";
-  sha256 = "0q2zzrsx899wkhjvyqiwj0jkjr81dl3ghlrvgk0vzkkz9g901k0x";
+  version = "1.2.0.1";
+  src = fetchgit {
+    url = "git://github.com/gregorycollins/hashtables.git";
+    sha256 = "1622ba3eb37e72cbedf01ae17162e045ca6506dea8a78750cc85805fe8e86129";
+    rev = "a045fa90f4bc3923f38d1b468ce4d3982cef85e0";
+  };
   buildDepends = [ hashable primitive vector ];
   meta = {
     homepage = "http://github.com/gregorycollins/hashtables";