From 5ae966b9dcdf07cd5ac4534edcab2a1b67596b17 Mon Sep 17 00:00:00 2001
From: Heitor Augusto <44377258+HeitorAugustoLN@users.noreply.github.com>
Date: Wed, 29 Oct 2025 13:07:25 -0300
Subject: [PATCH] libcosmicAppHook: include only fallback themes from settings

---
 pkgs/by-name/li/libcosmicAppHook/package.nix | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/pkgs/by-name/li/libcosmicAppHook/package.nix b/pkgs/by-name/li/libcosmicAppHook/package.nix
index f4bc7bd4f34f..f3042e13ac8e 100644
--- a/pkgs/by-name/li/libcosmicAppHook/package.nix
+++ b/pkgs/by-name/li/libcosmicAppHook/package.nix
@@ -7,6 +7,7 @@
   lib,
   stdenv,
   makeSetupHook,
+  runCommand,
   makeBinaryWrapper,
   pkg-config,
   targetPackages,
@@ -44,8 +45,16 @@ makeSetupHook {
     ];
 
   substitutions = {
-    fallbackXdgDirs = "${lib.optionalString includeSettings "${targetPackages.cosmic-settings}/share:"}${targetPackages.cosmic-icons}/share";
-
+    fallbackXdgDirs =
+      let
+        fallbackThemes = runCommand "cosmic-fallback-themes" { } ''
+          mkdir -p $out/share
+          ln -s ${targetPackages.cosmic-settings}/share/cosmic $out/share/cosmic
+        '';
+      in
+      lib.makeSearchPath "share" (
+        lib.optionals includeSettings [ fallbackThemes ] ++ [ targetPackages.cosmic-icons ]
+      );
     cargoLinkerVar = targetPackages.stdenv.hostPlatform.rust.cargoEnvVarTarget;
     # force linking for all libraries that may be dlopen'd by libcosmic/iced apps
     cargoLinkLibs = lib.escapeShellArgs (