suites: simplify code

If this code had been written this way, I wouldn't have opened #200 in
the first place. (perspective of a begginer nix-langer)

closes: #200

suites/default.nix

@@ -5,19 +5,15 @@ let
   profiles = dev.os.mkProfileAttrs (toString ../profiles);
   users = dev.os.mkProfileAttrs (toString ../users);
 
-  allProfiles =
-    let defaults = lib.collect (x: x ? default) profiles;
-    in map (x: x.default) defaults;
+  allProfiles = dev.os.profileMap profiles;
 
-  allUsers =
-    let defaults = lib.collect (x: x ? default) users;
-    in map (x: x.default) defaults;
+  allUsers = dev.os.profileMap users;
 
 
   suites = with profiles; rec {
-    base = [ users.nixos users.root ];
+    base = dev.os.profileMap [ users.nixos users.root ];
   };
 in
-lib.mapAttrs (_: v: dev.os.profileMap v) suites // {
+suites // {
   inherit allProfiles allUsers;
 }