fenixPkgs: proc:
fenixPkgs.complete.withComponents ([
  "rustc"
  "rust-std"
  "cargo"
] ++ (if proc != "build" then [
  "clippy"
] else []) ++ (if proc == "dev" then [
  "rust-docs"
  "rustfmt"
  "rust-src"
  "rust-analyzer"
] else []))