diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index 2f350738238e4..7c3f94dcd16e9 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -102,7 +102,7 @@ with pkgs;
         inherit hasDistutilsCxxPatch;
         # TODO: rename to pythonOnBuild
         # Not done immediately because its likely used outside Nixpkgs.
-        pythonForBuild = pythonOnBuildForHost;
+        pythonForBuild = pythonOnBuildForHost.override { inherit packageOverrides; self = pythonForBuild; };
 
         tests = callPackage ./tests.nix {
           python = self;