remove "parts" directory and restructure modules

machines/genepi/builder.nix

@@ -1,6 +1,3 @@
-let
-  keys = import ../../parts/keys.nix;
-in
 {
   imports = [
     ../../modules/remote-builder.nix
@@ -8,6 +5,8 @@ in
 
   roles.remote-builder = {
     enable = true;
-    authorizedKeys = [ keys.hosts.haze ];
+    authorizedKeys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGa8R8obgptefcp27Cdp9bc2fiyc9x0oTfMsTPFp2ktE rpqt@haze"
+    ];
   };
 }

machines/genepi/configuration.nix

@@ -23,9 +23,9 @@
     ../../modules/lounge.nix
     ../../modules/unbound.nix
     ../../modules/unbound-auth.nix
-    ../../system/core
-    ../../system/nix
+    self.nixosModules.nix-defaults
 
+    self.nixosModules.user-rpqt
   ];
 
   networking.hostName = "genepi";