anchor.diff:    ];
   
     buildInputs = [
  -    python3
  +    python3Packages.python
  +    python3Packages.wrapPython
       readline
       popt
       dbus
  
positive.code: { lib, stdenv
  , buildPackages
  , fetchurl
  , python3
  , wafHook
  , pkg-config
  , bison
  
negative.code:   # module, which works correctly in all cases.
    PYTHON_CONFIG = "/invalid";
  
    pythonPath = [ python3Packages.dnspython tdb ];
  
    preBuild = ''
      export MAKEFLAGS="-j $NIX_BUILD_CORES"
    '';
  