anchor.diff:    });
   
     pypy27 = callPackage ./pypy {
  -    self = pkgs.pypy27;
  +    self = __splicedPackages.pypy27;
       sourceVersion = {
         major = "7";
         minor = "3";
  
positive.code: 
    pypy38_prebuilt = callPackage ./pypy/prebuilt.nix {
      # Not included at top-level
      self = pkgs.pythonInterpreters.pypy38_prebuilt;
      sourceVersion = {
        major = "7";
        minor = "3";
  
negative.code:   };
  
    python38 = callPackage ./cpython {
      self = __splicedPackages.python38;
      sourceVersion = {
        major = "3";
        minor = "8";
  