{
  description = "testing nix flakes for server deployment";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/release-21.11";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    uplcg = {
      url = "git+https://stuebinm.eu/git/uplcg?ref=main";
      flake = false;
    };
    # woitb = {
    #   url = "git+https://stuebinm.eu/git/woitb?ref=main";
    #   flake = false;
    # };
    # workadventure = {
    #   url = "git+https://stuebinm.eu/git/workadventure-nix";
    #   flake = false;
    # };
    tracktrain = {
      url = "git+https://stuebinm.eu/git/tracktrain?ref=main";
      flake = false;
    };
    blog = {
      url = "path:/home/stuebinm/Dokumente/blog";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, ... }@inputs: {

    nixosConfigurations =
      let mkConfig = config: nixpkgs.lib.nixosSystem {
            system = "x86_64-linux";
            modules = [ config ./common/default.nix ];

            specialArgs = { inherit inputs; };
          };
      in {
        chaski = mkConfig ./hosts/chaski/configuration.nix;
        flora = mkConfig ./hosts/flora/configuration.nix;
      };
  };
}