refactor: schema

modules/capabilities/services/openssh.nix

@@ -3,8 +3,8 @@ let
   account = config.repo.account;
   personalPublicKeys =
     machines:
-    map (machine: machine.sshKeys.personal.publicKey) (
-      lib.filter (machine: machine.sshKeys ? personal) (builtins.attrValues machines)
+    map (machine: (machine.sshKeys or { }).personal.publicKey) (
+      lib.filter (machine: (machine.sshKeys or { }) ? personal) (builtins.attrValues machines)
     );
 in
 {