{ callPackage }: { rustc, cargo, ... }: { rust = { inherit rustc cargo; }; buildRustPackage = callPackage ./default.nix { inherit rustc cargo; fetchcargo = callPackage ./fetchcargo.nix { inherit cargo; }; }; rustcSrc = callPackage ../../development/compilers/rust/rust-src.nix { inherit rustc; }; }