No, that didn't work. Try to disable a different warning.

Author: joto

.github/workflows/ci.yml

@@ -66,7 +66,7 @@ jobs:
           - image: "debian:experimental"
             c_compiler: clang
             cpp_compiler: clang++
-            CXXFLAGS: -Wno-variadic-macro-arguments-omitted
+            CXXFLAGS: -Wno-c++20-extensions
     container:
       image: ${{ matrix.image }}
       env: