diff --git a/templates/slepc/3.18.1/data.slepc.arm.cpu.config b/templates/slepc/3.18.1/data.slepc.arm.cpu.config
index 0d8cfa544c38025324eb54280c21bf429af8b69d..f72135f82355e3327272fe54e60e402f950a35a9 100644
--- a/templates/slepc/3.18.1/data.slepc.arm.cpu.config
+++ b/templates/slepc/3.18.1/data.slepc.arm.cpu.config
@@ -17,6 +17,7 @@ module use software/moduledeps/bisheng${BISHENG_VERSION}
 module load python3/3.7.10
 #export PETSC_ARCH=arch-linux-c-debug
 export PETSC_DIR=${JARVIS_TMP}/petsc-3.18.1
+export CC=mpicc CXX=mpicxx FC=mpifort F77=mpifort
 ./jarvis -install petsc/3.18.1 clang+mpi
 cd ${JARVIS_TMP}
 tar -xvf ${JARVIS_DOWNLOAD}/slepc-3.18.1.tar.gz -C ${JARVIS_TMP}