diff --git a/pkgs/misc/nix/unstable.nix b/pkgs/misc/nix/unstable.nix
index 571ea6125da4..404a5db9fa05 100644
--- a/pkgs/misc/nix/unstable.nix
+++ b/pkgs/misc/nix/unstable.nix
@@ -4,11 +4,11 @@
 }:
 
 stdenv.mkDerivation {
-  name = "nix-0.11pre7667";
+  name = "nix-0.11pre7681";
   
   src = fetchurl {
-    url = http://nix.cs.uu.nl/dist/nix/nix-0.11pre7667/nix-0.11pre7667.tar.bz2;
-    md5 = "f1228dbf6dc6a1fce41fb881850a5a82";
+    url = http://nix.cs.uu.nl/dist/nix/nix-0.11pre7681/nix-0.11pre7681.tar.bz2;
+    md5 = "e62140ecdf7ed7203341004c4704e310";
   };
   
   buildInputs = [perl curl];