builder: allow using modules

hosts/builder/default.nix

@@ -5,9 +5,11 @@
   pwd,
   config,
   inputs,
+  outputs,
   ...
 }: {
-  imports = [
+  imports =
+    [
       inputs.disko.nixosModules.disko
 
       ./disko.nix
@@ -21,7 +23,8 @@
 
       # "${pwd}/features-nixos/optional/hydra.nix"
       # "${pwd}/features-nixos/optional/jenkins-agent.nix"
-  ];
+    ]
+    ++ (builtins.attrValues outputs.nixosModules);
 
   frajul.gitlab-runner = {
     enable = false;