diff --git a/pkgs/development/compilers/rustc/0.12.nix b/pkgs/development/compilers/rustc/1.0.0-alpha.nix
similarity index 100%
rename from pkgs/development/compilers/rustc/0.12.nix
rename to pkgs/development/compilers/rustc/1.0.0-alpha.nix
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ea0e07ccf56..444fcd870e1 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3975,7 +3975,7 @@ let
     ocaml = ocaml_3_08_0;
   };
 
-  rustc       = callPackage ../development/compilers/rustc/0.12.nix {};
+  rustc       = callPackage ../development/compilers/rustc/1.0.0-alpha.nix {};
   rustcMaster = callPackage ../development/compilers/rustc/head.nix {};