diff --git a/libfuse/tst-build.sh b/libfuse/tst-build.sh
index c3dfd16314146f40a5c8ed1dfe53de2f37e33219..82ec393ffb61485a041137f9da36a41840ade8c4 100755
--- a/libfuse/tst-build.sh
+++ b/libfuse/tst-build.sh
@@ -51,6 +51,12 @@ ensure_meson_version() {
 build_tool() {
     cp -r "$g_tool_dir" "$g_install_dir" && cd "$g_install_dir/libfuse" || return 1
 
+    # GCC < 10 不支持 -std=c++20，只支持 -std=c++2a，在构建副本中去掉硬编码的 cpp_args
+    if ! cc -std=c++20 -x c++ -E /dev/null &>/dev/null; then
+        echo "=== patching build copy: compiler does not support -std=c++20 ==="
+        sed -i "/cpp_args\s*:\s*'-std=c++20'/d" example/meson.build
+    fi
+
     echo "=== meson setup ==="
     meson setup build -Dtests=true -Dexamples=true -Dutils=true \
         || return 1