anchor.diff:  , PCSC
   }:
   
  -rustPlatform.buildRustPackage rec {
  +buildPythonPackage rec {
     pname = "johnnycanencrypt";
     version = "0.5.0";
     disabled = pythonOlder "3.7";
  
positive.code:     rev = "v${version}";
      sha256 = "192wfrlyylrpzq70yki421mi1smk8q2cyki2a1d03q7h6apib3j4";
    };
    cargoPatches = [ ./Cargo.lock.patch ];
  
    cargoSha256 = "0ifvpdizcdp2c5x2x2j1bhhy5a75q0pk7a63dmh52mlpmh45fy6r";
  
  
negative.code:     sed '/project-url = /d' -i Cargo.toml
    '';
  
    preCheck = ''
      export TESTDIR=$(mktemp -d)
      cp -r tests/ $TESTDIR
  