Gnome/blackbox: set up catpuccin theme

roles/gnome/programs/blackbox.nix

@@ -8,11 +8,22 @@
     ];
   };
 
-  home-manager.users.toast = {lib, ...}: {
+  home-manager.users.toast = {
+    lib,
+    pkgs,
+    ...
+  }: {
+    home.file.".local/share/blackbox/schemes".source =
+      (pkgs.fetchgit {
+        url = "https://github.com/catppuccin/tilix.git";
+        hash = "sha256-jWnxEtoqqqitHsaDErQNNYjv8DBcrJD0XeIKNopbO3c=";
+      })
+      + /themes;
     dconf.settings = with lib.hm.gvariant; {
       "com/raggesilver/BlackBox" = {
         # Dark mode
         style-preference = mkUint32 2;
+        theme-dark = "Catppuccin Mocha";
         # Default working directory is home folder
         working-directory-mode = mkUint32 1;
         custom-font = "JetBrainsMono Nerd Font Mono 12";