buildbot: get rid of python overrides (#350860)

}:

# Take packages from self first, then python.pkgs (and secondarily pkgs)

lib.makeScope (self: newScope (self.python.pkgs // self)) (self: {

  python = python3.override {

    self = self.python;

    packageOverrides = self: super: {

      moto = super.moto.overridePythonAttrs (oldAttrs: {

        # a lot of tests -> very slow, we already build them when building python packages

        doCheck = false;

      });

    };

  };

  python = python3;

  buildbot-pkg = self.callPackage ./pkg.nix { };