self: super: { pinch = if builtins.hasAttr "pinch" super then super.pinch else super.writeShellScriptBin "pinch" '' exec ${self.python3}/bin/python3 ${ super.fetchgit { url = "https://scottworley.com/pinch.git"; rev = "1.3"; sha256 = "1l2pq0pqmjh5q8ggmz6sw6bz0nnz0jy92l5qgax8bmpm1qcszmxf"; } }/pinch.py "$@" ''; }