{ inputs = { nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; utils.url = "github:numtide/flake-utils"; }; outputs = { self, nixpkgs, utils }: utils.lib.eachDefaultSystem (system: let pkgs = import nixpkgs { inherit system; }; in { devShell = pkgs.mkShell { packages = with pkgs; [ cargo rustc rustfmt clippy rust-analyzer ]; RUST_SRC_PATH = pkgs.rustPlatform.rustLibSrc; }; }); }