diff --git a/monitoring.sh b/monitoring.sh
index d1a7e57ae8..2b316256d1 100644
--- a/monitoring.sh
+++ b/monitoring.sh
@@ -26,10 +26,10 @@ if [[ $ALIBUILD_O2_TESTS ]]; then
 fi
 
 cmake $SOURCEDIR                                              \
-      -DRDKAFKA_ROOT=${LIBRDKAFKA_ROOT}  \
-      -DCMAKE_INSTALL_PREFIX=$INSTALLROOT                     \
-      ${BOOST_REVISION:+-DBOOST_ROOT=$BOOST_ROOT}                 \
-      -DCMAKE_EXPORT_COMPILE_COMMANDS=ON 
+  ${LIBRDKAFKA_REVISION:+-DRDKAFKA_ROOT="${LIBRDKAFKA_ROOT}"} \
+  -DCMAKE_INSTALL_PREFIX=$INSTALLROOT                         \
+  ${BOOST_REVISION:+-DBOOST_ROOT=$BOOST_ROOT}                 \
+  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
 
 cp ${BUILDDIR}/compile_commands.json ${INSTALLROOT}