# Fetches a chicken egg from henrietta using `chicken-install -r' # See: http://wiki.call-cc.org/chicken-projects/egg-index-4.html { stdenvNoCC, chicken }: { name, version, md5 ? "", sha256 ? "" }: if md5 != "" then throw "fetchegg does not support md5 anymore, please use sha256" else stdenvNoCC.mkDerivation { name = "chicken-${name}-export-${version}"; builder = ./builder.sh; nativeBuildInputs = [ chicken ]; outputHashAlgo = "sha256"; outputHashMode = "recursive"; outputHash = sha256; inherit version; eggName = name; impureEnvVars = stdenvNoCC.lib.fetchers.proxyImpureEnvVars; }