{
  inputs = {
    nixpkgs.url = "nixpkgs/nixpkgs-unstable";
  };
  outputs = {
    nixpkgs,
    self,
    ...
  }: let
    system = "x86_64-linux";
    pkgs = nixpkgs.legacyPackages.${system};
  in {
    devShells.${system} = {
      default = pkgs.mkShell {
        packages = [
          pkgs.cobalt
        ];
      };
    };
  };
}