{ stdenv, fetchurl, callPackage, version, hashes, }: let platform = stdenv.hostPlatform.rust.rustcTarget; src = fetchurl { url = "https://static.rust-lang.org/dist/rust-${version}-${platform}.tar.gz"; sha256 = hashes.${platform} or (throw "missing bootstrap url for platform ${platform}"); }; in callPackage ./binary.nix { inherit version src platform; versionType = "bootstrap"; }