diff --git a/modules/plugins/theme/theme.nix b/modules/plugins/theme/theme.nix
index 9ab088a1..72a006d3 100644
--- a/modules/plugins/theme/theme.nix
+++ b/modules/plugins/theme/theme.nix
@@ -17,18 +17,18 @@
     inherit lib config;
   };
 
-  numbers = lib.stringToCharacters "0123456789ABCDEF";
-  generateBase16Options = listToAttrs (map (i: {
-      name = "base0${i}";
-      value = mkOption {
-        type = hexColor;
-        apply = v:
-          if hasPrefix "#" v
-          then v
-          else "#${v}";
-      };
-    })
-    numbers);
+  numbers = ["0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "A" "B" "C" "D" "E" "F"];
+  base16Options = listToAttrs (map (n: {
+    name = "base0${n}";
+    value = mkOption {
+      description = "The base0${n} color to use";
+      type = hexColor;
+      apply = v:
+        if hasPrefix "#" v
+        then v
+        else "#${v}";
+    };
+  }) numbers);
 in {
   options.vim.theme = {
     enable = mkOption {