{
  description = "eulerfunt in Rust";

  inputs = {
    nixpkgs.url = github:nixos/nixpkgs/release-22.05;
    utils.url = github:numtide/flake-utils;
    rust-overlay.url = github:oxalica/rust-overlay;
  };

  outputs = { self, nixpkgs, utils, rust-overlay }:
    utils.lib.eachDefaultSystem
      (system:
        let
          overlays = [ rust-overlay.overlays.default ];

          pkgs = import nixpkgs {
            inherit system overlays;
          };

          toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain;
        in
        {
          devShells = rec {
            default = pkgs.mkShell {
              buildInputs = [ toolchain ];
            };
            withLsp = pkgs.mkShell {
              buildInputs = [
                toolchain
                pkgs.rust-analyzer
              ];
            };
          };
        }
      );
}