let
  nixpkgsPath = "/home/aither/workspace/vpsadmin/nixpkgs";
  vpsadminosPath = "/home/aither/workspace/vpsadmin/vpsadminos";

in
{
  vpsadminos = {configuration, modules ? []}:
    let
      # this is fed into scopedImport so vpsadminos sees correct <nixpkgs> everywhere
      overrides = {
        __nixPath = [
          { prefix = "nixpkgs"; path = nixpkgsPath; }
          { prefix = "vpsadminos"; path = vpsadminosPath; }
        ] ++ builtins.nixPath;
        import = fn: scopedImport overrides fn;
        scopedImport = attrs: fn: scopedImport (overrides // attrs) fn;
        builtins = builtins // overrides;
      };
    in
      builtins.scopedImport overrides (vpsadminosPath + "/os/") {
        nixpkgs = nixpkgsPath;
        system = "x86_64-linux";
        extraModules = modules;
        inherit configuration;
      };
}