anchor.diff:        --replace "distro>=1.5.0,<1.6.0" "distro"
     '';
   
  -  checkInputs = [ jsonschema mock nose ];
  +  checkInputs = [ jsonschema mock pytestCheckHook pytest-xdist ];
   
     propagatedBuildInputs = [
       awscrt
  
positive.code: 
      # https://github.com/NixOS/nixpkgs/issues/16144#issuecomment-225422439
      export HOME=$TMP
  
      AWS_TEST_COMMAND=$out/bin/aws python scripts/ci/run-tests
    '';
  
    postInstall = ''
  
negative.code: { lib, python3, groff, less, fetchFromGitHub }:
  let
    py = python3.override {
      packageOverrides = self: super: {
        awscrt = super.awscrt.overridePythonAttrs (oldAttrs: rec {
          version = "0.12.4";
          src = self.fetchPypi {
            inherit (oldAttrs) pname;
            inherit version;
            sha256 = "sha256:1cmfkcv2zzirxsb989vx1hvna9nv24pghcvypl0zaxsjphv97mka";
          };
        });
        botocore = super.botocore.overridePythonAttrs (oldAttrs: rec {
          version = "2.0.0dev155";
          src = fetchFromGitHub {
            owner = "boto";
            repo = "botocore";
            rev = "7083e5c204e139dc41f646e0ad85286b5e7c0c23";
            sha256 = "sha256-aiCc/CXoTem0a9wI/AMBRK3g2BXJi7LpnUY/BxBEKVM=";
          };
          propagatedBuildInputs = super.botocore.propagatedBuildInputs ++ [py.pkgs.awscrt];
        });
  