diff --git a/scripts/OPAL.build b/scripts/OPAL.build
index e787f5a..27c8d8b 100755
--- a/scripts/OPAL.build
+++ b/scripts/OPAL.build
@@ -6,7 +6,7 @@ module use unstable
 
 # add -fopenmp to CC and CXX, if you want to compile with OpenMP
 function em.configure() {
-	CC="$MPICC" CXX="$MPICXX" cmake \
+	cmake \
 		-DCMAKE_INSTALL_PREFIX="${PREFIX}" \
 		-DCMAKE_BUILD_TYPE=RELEASE \
 		-DENABLE_SAAMG_SOLVER=TRUE \