diff --git a/pkgs/tools/package-management/nix/unstable.nix b/pkgs/tools/package-management/nix/unstable.nix
index beaaf66f751..e14db164603 100644
--- a/pkgs/tools/package-management/nix/unstable.nix
+++ b/pkgs/tools/package-management/nix/unstable.nix
@@ -5,7 +5,7 @@
 }:
 
 stdenv.mkDerivation {
-  name = "nix-0.13pre0.13pre14314";
+  name = "nix-0.13pre14314";
   
   src = fetchurl {
     url = http://hydra.nixos.org/build/2513/download/1/nix-0.13pre14314.tar.bz2;