diff --git a/pkgs/development/libraries/haskell/cabal2nix/default.nix b/pkgs/development/libraries/haskell/cabal2nix/default.nix
index 8f9ba3240653..34353338184e 100644
--- a/pkgs/development/libraries/haskell/cabal2nix/default.nix
+++ b/pkgs/development/libraries/haskell/cabal2nix/default.nix
@@ -2,11 +2,11 @@
 
 cabal.mkDerivation (self : {
   pname = "cabal2nix";
-  version = "v1.8-beta-12";
+  version = "v1.8-beta-13";
 
   src = fetchgit {
     url = "git://github.com/peti/cabal2nix.git";
-    rev = "e4592ca95b35cc27a4239003085683f98b9ee83b";
+    rev = "11fb101a229373d37704b3b9e62df44c825dd081";
   };
 
   extraBuildInputs = [HTTP regexPosix];