{
  description = "c compile experiments";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
  };

  outputs = { nixpkgs, ... }:
    let
      systems = [ "x86_64-linux" ];
    in
      {
        config = {
          nixpkgs.config.allowUnfree = true;
        };

        devShells = nixpkgs.lib.genAttrs systems (system:
          let
            pkgs = nixpkgs.legacyPackages.${system};
          in
            {
              default = pkgs.mkShell {
                packages = [
                  pkgs.gnumake
                  pkgs.gcc-arm-embedded
                  pkgs.stlink
                ];
              };
            }
        );
      };
}