anchor.diff:  , buildPythonPackage
   , fetchPypi
   , pythonOlder
  -, pythonAtLeast
   , pythonRelaxDepsHook
   , writeText
   , asttokens
  
positive.code: , sphinx_rtd_theme
  , pytest-runner
  , setuptools-scm
  }:
  
  let
  
negative.code: in
  buildPythonPackage rec {
    pname = "vyper";
    version = "0.3.3";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "sha256-BAnNj27B1HAb9VVDA69bFGbQjeOpl0g5EB2juajqBAw=";
    };
  
    nativeBuildInputs = [
      # Git is used in setup.py to compute version information during building
      # ever since https://github.com/vyperlang/vyper/pull/2816
      git
  
      pythonRelaxDepsHook
      pytest-runner
      setuptools-scm
  