diff --git a/pkgs/top-level/release-python.nix b/pkgs/top-level/release-python.nix
index 029ea7c9d4c..1c654272bb8 100644
--- a/pkgs/top-level/release-python.nix
+++ b/pkgs/top-level/release-python.nix
@@ -6,7 +6,7 @@
 { nixpkgs ? { outPath = (import ./all-packages.nix {}).lib.cleanSource ../..; revCount = 1234; shortRev = "abcdef"; }
 , officialRelease ? false
 , # The platforms for which we build Nixpkgs.
-  supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" ]
+  supportedSystems ? [ "x86_64-linux" ]
 }:
 
 with import ./release-lib.nix {inherit supportedSystems; };
@@ -14,6 +14,7 @@ with import ./release-lib.nix {inherit supportedSystems; };
 (mapTestOn {
   pypyPackages = packagePlatforms pkgs.pypyPackages;
   pythonPackages = packagePlatforms pkgs.pythonPackages;
-  python34Packages = packagePlatforms pkgs.python34Packages;
   python33Packages = packagePlatforms pkgs.python33Packages;
+  python34Packages = packagePlatforms pkgs.python34Packages;
+  python35Packages = packagePlatforms pkgs.python35Packages;
 })