diff --git a/pkgs/misc/nix/unstable.nix b/pkgs/misc/nix/unstable.nix
index 5ef482395f40..56030eb69be2 100644
--- a/pkgs/misc/nix/unstable.nix
+++ b/pkgs/misc/nix/unstable.nix
@@ -4,11 +4,11 @@
 }:
 
 stdenv.mkDerivation {
-  name = "nix-0.11pre8026";
+  name = "nix-0.11pre8085";
   
   src = fetchurl {
-    url = http://nix.cs.uu.nl/dist/nix/nix-unstable-latest/nix-0.11pre8026.tar.bz2;
-    md5 = "3db1795ca6645ecefea63213b40d7e3c";
+    url = http://nix.cs.uu.nl/dist/nix/nix-0.11pre8085/nix-0.11pre8085.tar.bz2;
+    md5 = "5690869fc2d3ef70a221b42282315980";
   };
   
   buildInputs = [perl curl];