self: super: { pinch = if builtins.hasAttr "pinch" super then super.pinch else super.writeShellScriptBin "pinch" '' exec ${self.python3}/bin/python3 ${ super.fetchgit { url = "https://scottworley.com/pinch.git"; rev = "1.2"; sha256 = "0s0rk1m0irsdj0xjnix9y1825pjv7lhbmnn73jgjbj1hi6wqwpfh"; } }/pinch.py "$@" ''; }