The bundled libxkbcommon has hardcoded paths from the CI build environment baked into the library. Set XKB_CONFIG_ROOT to point to the bundled XKB data instead. Similarly, set FONTCONFIG_FILE and FONTCONFIG_PATH to use the bundled fontconfig configuration. This fixes the segfault on startup caused by libxkbcommon trying to load XKB data from a non-existent CI runner path.