yes

stylix/testbed.nix

@@ -1,6 +1,9 @@
-{ pkgs, inputs, lib, ... }:
+{
-
+  pkgs,
-let
+  inputs,
+  lib,
+  ...
+}: let
   username = "guest";
 
   commonModule = {config, ...}: {
@@ -25,10 +28,12 @@ let
     };
   };
 
-  autoload = builtins.concatLists
+  autoload =
+    builtins.concatLists
     (lib.mapAttrsToList
-      (name: _:
+      (
-        let testbed = {
+        name: _: let
+          testbed = {
             inherit name;
             module = "${inputs.self}/modules/${name}/testbed.nix";
           };
@@ -37,9 +42,7 @@ let
       )
       (builtins.readDir "${inputs.self}/modules"));
 
-  makeTestbed =
+  makeTestbed = testbed: stylix: let
-    testbed: stylix:
-    let
     name = "testbed-${testbed.name}-${stylix.polarity}";
 
     system = lib.nixosSystem {
@@ -80,7 +83,8 @@ let
     lib.nameValuePair name script;
 
   # This generates a copy of each testbed for each of the following themes.
-  makeTestbeds = testbed: map (makeTestbed testbed) [
+  makeTestbeds = testbed:
+    map (makeTestbed testbed) [
       {
         enable = true;
         image = pkgs.fetchurl {
@@ -89,7 +93,7 @@ let
           hash = "sha256-S0MumuBGJulUekoGI2oZfUa/50Jw0ZzkqDDu1nRkFUA=";
         };
         base16Scheme = "${pkgs.base16-schemes}/share/themes/catppuccin-latte.yaml";
-      polarity = "light";
+        polarity.force = "light";
       }
       {
         enable = true;
@@ -99,9 +103,8 @@ let
           hash = "sha256-Dm/0nKiTFOzNtSiARnVg7zM0J1o+EuIdUQ3OAuasM58=";
         };
         base16Scheme = "${pkgs.base16-schemes}/share/themes/catppuccin-macchiato.yaml";
-      polarity = "dark";
+        polarity.force = "dark";
       }
     ];
-
 in
   lib.listToAttrs (lib.flatten (map makeTestbeds autoload))