settings/hyprland.nix

@@ -3,16 +3,10 @@
 let
   hyprland-pkgs = inputs.hyprland.packages.${pkgs.stdenv.hostPlatform.system};
 
-  # hyprutils-0.13.1 was compiled with GCC 15 (requires GLIBCXX_3.4.34) but
-  # its RPATH was patched to gcc-14.3.0-lib which only goes to GLIBCXX_3.4.33.
-  # Locate gcc-15's libstdc++ from Hyprland's own runtime closure (hyprutils
-  # is a transitive dep, so gcc-15-lib will appear here too).
-  gcc15-lib = lib.head (lib.filter
-    (p: lib.hasSuffix "-lib" p && lib.match ".*/gcc-[0-9]+\\.[0-9]+\\.[0-9]+-lib" p != null)
-    (lib.splitString "\n"
-      (lib.removeSuffix "\n"
-        (builtins.readFile
-          "${pkgs.closureInfo { rootPaths = [ hyprland-pkgs.hyprland ]; }}/store-paths"))));
+  # hyprutils-0.13.1 requires GLIBCXX_3.4.34 (GCC 15) but Hyprland's RPATH
+  # was patched to gcc-14.3.0-lib which only provides up to GLIBCXX_3.4.33.
+  # Use our nixpkgs GCC 15 to supply the missing symbol via LD_PRELOAD.
+  gcc15-stdlib = pkgs.gcc15.cc.lib;
 
   hyprland-wrapped = pkgs.symlinkJoin {
     name    = hyprland-pkgs.hyprland.name;
@@ -28,9 +22,9 @@ let
     };
     postBuild = ''
       wrapProgram $out/bin/start-hyprland \
-        --set LD_PRELOAD "${gcc15-lib}/lib/libstdc++.so.6"
+        --set LD_PRELOAD "${gcc15-stdlib}/lib/libstdc++.so.6"
       wrapProgram $out/bin/Hyprland \
-        --set LD_PRELOAD "${gcc15-lib}/lib/libstdc++.so.6"
+        --set LD_PRELOAD "${gcc15-stdlib}/lib/libstdc++.so.6"
 
       # The session .desktop symlinks to the original package and contains
       # its absolute store path.  Rewrite Exec= to our wrapped binary so