anchor.diff:  , lib
   , buildPythonPackage
   , fetchFromGitHub
  +, fetchpatch
   , pythonOlder
   , setuptools-scm
   , idna
  
positive.code:     owner = "agronholm";
      repo = pname;
      rev = version;
      sha256 = "sha256-aMnXZ+4dlybId2QhjE/3STY+Sj/vzI6K7wmqqx+P8yE=";
    };
  
    preBuild = ''
      export SETUPTOOLS_SCM_PRETEND_VERSION=${version}
  
negative.code: 
  buildPythonPackage rec {
    pname = "anyio";
    version = "3.5.0";
    format = "pyproject";
    disabled = pythonOlder "3.7";
  
  