{
  description = "A very simple programming language used to map functions to commands";
  inputs = {
    # nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    nixpkgs.url = "github:soispha/nixpkgs/licensure";

    # inputs for following
    flake-compat = {
      url = "github:edolstra/flake-compat";
      flake = false;
    };

    crane = {
      url = "github:ipetkov/crane";
      inputs = {
        nixpkgs.follows = "nixpkgs";
      };
    };
    flake-utils = {
      url = "github:numtide/flake-utils";
      inputs = {};
    };
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs = {
        nixpkgs.follows = "nixpkgs";
        flake-utils.follows = "flake-utils";
      };
    };
  };

  outputs = {
    nixpkgs,
    crane,
    flake-utils,
    rust-overlay,
    ...
  }:
    flake-utils.lib.eachDefaultSystem (system: let
      pkgs = import nixpkgs {
        inherit system;
        overlays = [(import rust-overlay)];
      };

      nightly = false;
      rust =
        if nightly
        then
          (pkgs.rust-bin.selectLatestNightlyWith (toolchain:
              toolchain.default))
          .override {
            extensions = ["rustc-codegen-cranelift-preview"];
          }
        else pkgs.rust-bin.stable.latest.default;
      rust_min =
        if nightly
        then
          (pkgs.rust-bin.selectLatestNightlyWith (toolchain:
              toolchain.minimal))
          .override {
            extensions = ["rustc-codegen-cranelift-preview"];
          }
        else pkgs.rust-bin.stable.latest.minimal;

      craneLib = (crane.mkLib pkgs).overrideToolchain rust_min;

      nativeBuildInputs = [];
      buildInputs = [];

      craneBuild = craneLib.buildPackage {
        src = craneLib.cleanCargoSource ./.;

        doCheck = true;
        inherit nativeBuildInputs buildInputs;
      };
    in {
      checks.default = craneBuild;
      packages = {
        default = craneBuild;
      };

      devShells.default = pkgs.mkShell {
        packages = with pkgs; [
          alejandra

          cocogitto
          licensure

          rust
          cargo-edit
          cargo-expand
        ];
        inherit nativeBuildInputs buildInputs;
      };
    });
}