diff --git a/modules/output.nix b/modules/output.nix
index 0beb31d4..112ee18e 100644
--- a/modules/output.nix
+++ b/modules/output.nix
@@ -80,7 +80,12 @@ in
         "lua"
       ];
       default = "lua";
-      description = "Whether the generated file is a vim or a lua file";
+      description = ''
+        Whether the generated file is a vim or a lua file
+
+        Read-only outside of `files` submodules.
+      '';
+      readOnly = config.isTopLevel;
     };
 
     path = mkOption {
diff --git a/modules/top-level/output.nix b/modules/top-level/output.nix
index 13998071..eca831aa 100644
--- a/modules/top-level/output.nix
+++ b/modules/top-level/output.nix
@@ -274,7 +274,6 @@ in
       );
     in
     {
-      type = lib.mkForce "lua";
       finalPackage = wrappedNeovim;
       initPath = "${init}";