{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    rust-overlay.url = "github:oxalica/rust-overlay";
    futils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, rust-overlay, futils } @ inputs:
    let
      inherit (nixpkgs) lib;
      inherit (lib) recursiveUpdate;
      inherit (futils.lib) eachDefaultSystem defaultSystems;

      nixpkgsFor = lib.genAttrs defaultSystems (system: import nixpkgs {
        inherit system;
        overlays = [
          rust-overlay.overlays.default
        ];
      });

      anySystemOutputs = {};

      multipleSystemsOutputs = eachDefaultSystem (system:
        let
          pkgs = nixpkgsFor.${system};
        in
        {
          devShell = pkgs.mkShell {
            buildInputs = with pkgs; [
              (rust-bin.fromRustupToolchainFile ./rust-toolchain.toml)
              cargo-audit
              cargo-edit
              cargo-expand
              cargo-flamegraph
              cargo-release
              cargo-sort
              cargo-tarpaulin
              git
              pre-commit
            ];

            RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
          };
        });
    in
    recursiveUpdate multipleSystemsOutputs anySystemOutputs;
}