diff --git a/.jenkins/lsu/env-clang-17.sh b/.jenkins/lsu/env-clang-17.sh
index b307443ff47..8de90c7e624 100644
--- a/.jenkins/lsu/env-clang-17.sh
+++ b/.jenkins/lsu/env-clang-17.sh
@@ -15,10 +15,10 @@ module load openmpi
 export HPXRUN_RUNWRAPPER=srun
 export CXX_STD="20"
 export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
+export CXXFLAGS = "-fopenmp -Wno-pass-failed ${CXXFLAGS}"
 
 configure_extra_options+=" -DCMAKE_BUILD_TYPE=${build_type}"
 configure_extra_options+=" -DHPX_WITH_CXX_STANDARD=${CXX_STD}"
-configure_extra_options+=" -DCMAKE_CXX_FLAGS=-fopenmp"
 configure_extra_options+=" -DHPX_WITH_MALLOC=system"
 configure_extra_options+=" -DHPX_WITH_FETCH_ASIO=ON"
 configure_extra_options+=" -DHPX_WITH_COMPILER_WARNINGS=ON"
diff --git a/.jenkins/lsu/env-gcc-13.sh b/.jenkins/lsu/env-gcc-13.sh
index e59dc916d0e..71c2ff3c82d 100644
--- a/.jenkins/lsu/env-gcc-13.sh
+++ b/.jenkins/lsu/env-gcc-13.sh
@@ -15,9 +15,9 @@ module load openmpi
 export HPXRUN_RUNWRAPPER=srun
 export CXX_STD="20"
 export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
+export CXXFLAGS = "-fopenmp ${CXXFLAGS}"
 
 configure_extra_options+=" -DHPX_WITH_CXX_STANDARD=${CXX_STD}"
-configure_extra_options+=" -DCMAKE_CXX_FLAGS=-fopenmp"
 configure_extra_options+=" -DHPX_WITH_MALLOC=system"
 configure_extra_options+=" -DHPX_WITH_FETCH_ASIO=ON"
 configure_extra_options+=" -DHPX_WITH_COMPILER_WARNINGS=ON"