diff --git a/debian/qualify-clang.sh b/debian/qualify-clang.sh
index 6f54ce6d..9583c0a2 100755
--- a/debian/qualify-clang.sh
+++ b/debian/qualify-clang.sh
@@ -290,6 +290,13 @@ if ! lli-$VERSION opt.ll|grep -q "lli foo"; then
     lli-$VERSION opt.ll
     exit 1
 fi
+clang-$VERSION -O3 -emit-llvm foo.c -c -o foo.bc
+chmod +x foo.bc
+if ! ./foo.bc|grep -q "lli foo"; then
+    echo "executing ./foo.bc failed"
+    ./foo.bc
+    exit 1
+fi
 
 echo '#include <stddef.h>' > foo.c
 clang-$VERSION -c foo.c