anchor.diff:      sha256 = "sha256-wERP2YcwWMHA2Z4TqTTpIoXLBZksmWi/Ujwyv5vsCp0=";
       pythonVersion = "2.7";
       db = db.override { dbmSupport = !stdenv.isDarwin; };
  -    python = pkgs.python27;
  +    python = __splicedPackages.python27;
       inherit passthruFun;
       inherit (darwin) libunwind;
       inherit (darwin.apple_sdk.frameworks) Security;
     };
   
     pypy38 = callPackage ./pypy {
  -    self = pkgs.pypy38;
  +    self = __splicedPackages.pypy38;
       sourceVersion = {
         major = "7";
         minor = "3";
  
positive.code:   };
  
    python37 = callPackage ./cpython {
      self = pkgs.python37;
      sourceVersion = {
        major = "3";
        minor = "7";
  
negative.code: 
    # Minimal versions of Python (built without optional dependencies)
    python3Minimal = (callPackage ./cpython ({
      self = __splicedPackages.python3Minimal;
      inherit passthruFun;
      pythonAttr = "python3Minimal";
      # strip down that python version as much as possible
  