anchor.diff:      pyzmq
       requests
       tornado
  +  ] ++ stdenv.lib.optional (!pythonPackages.isPy3k) [
  +    futures
     ] ++ extraInputs;
   
     patches = [ ./fix-libcrypto-loading.patch ];
  
positive.code: {
    stdenv, python2Packages, openssl,
  
    # Many Salt modules require various Python modules to be installed,
    # passing them in this array enables Salt to find them.
  
negative.code: 
  let
    # Use tornado-4.x until https://github.com/saltstack/salt/issues/45790 is resolved
    tornado = pythonPackages.tornado.overridePythonAttrs (oldAttrs: rec {
      version = "4.5.3";
      name = "${oldAttrs.pname}-${version}";
      src = oldAttrs.src.override {
  