{ stdenv, fetchurl, callPackage, version, hashes }: let platform = if stdenv.hostPlatform.system == "i686-linux" then "i686-unknown-linux-gnu" else if stdenv.hostPlatform.system == "x86_64-linux" then "x86_64-unknown-linux-gnu" else if stdenv.hostPlatform.system == "armv7l-linux" then "armv7-unknown-linux-gnueabihf" else if stdenv.hostPlatform.system == "aarch64-linux" then "aarch64-unknown-linux-gnu" else if stdenv.hostPlatform.system == "i686-darwin" then "i686-apple-darwin" else if stdenv.hostPlatform.system == "x86_64-darwin" then "x86_64-apple-darwin" else throw "missing bootstrap url for platform ${stdenv.hostPlatform.system}"; src = fetchurl { url = "https://static.rust-lang.org/dist/rust-${version}-${platform}.tar.gz"; sha256 = hashes.${platform}; }; in callPackage ./binary.nix { inherit version src platform; versionType = "bootstrap"; }