diff --git a/coin/platform_configs/cmake_platforms.yaml b/coin/platform_configs/cmake_platforms.yaml
index 6e006ae0..97e99068 100644
--- a/coin/platform_configs/cmake_platforms.yaml
+++ b/coin/platform_configs/cmake_platforms.yaml
@@ -295,7 +295,7 @@ Configurations:
     Compiler: 'GCC'
     Features: ['Packaging','DebianPackaging','DisableTests', 'Insignificant']
     Environment variables: [
-        'DEBIAN_RULES_REF=6.9_gles',
+        'DEBIAN_RULES_REF=6.8_gles',
         'COIN_TARGET_DIST=tqtc-bookworm',
         'COIN_EXTRA_DEBIAN_PACKAGES={{.Env.HOME}}/debian_packages/',
         'COIN_SBUILD_CHROOT=stable-arm64-sbuild',