self: super: { pinch = if builtins.hasAttr "pinch" super then super.pinch else self.python3Packages.callPackage ({ buildPythonPackage, fetchgit, nix, git, mypy, }: buildPythonPackage rec { pname = "pinch"; version = "1.5"; src = fetchgit { url = "https://scottworley.com/pinch.git"; rev = version; sha256 = "0si7z78iy8b5dfjs8ijy8bq9fwcfq51syqxijkc6mg5m7awwsf3l"; }; checkInputs = [ nix git mypy ]; doCheck = true; checkPhase = "./test.sh"; }) { }; }