diff --git a/srcpkgs/python3-mpi4py/template b/srcpkgs/python3-mpi4py/template
index 216ea7b58f0..9950a8453d2 100644
--- a/srcpkgs/python3-mpi4py/template
+++ b/srcpkgs/python3-mpi4py/template
@@ -19,9 +19,17 @@ make_check=no
 
 post_extract() {
 	# recythonize
-	rm src/mpi4py/include/mpi4py/mpi4py.MPI.h \
-		src/mpi4py/include/mpi4py/mpi4py.MPI_api.h \
-		src/mpi4py.MPI.c
+	rm src/mpi4py.MPI.c \
+		src/mpi4py/include/mpi4py/mpi4py.MPI.h \
+		src/mpi4py/include/mpi4py/mpi4py.MPI_api.h
+}
+
+pre_build() {
+	if [ "${CROSS_BUILD}" ]; then
+		# Need to tell OpenMPI wrappers to use cross compilers
+		export OMPI_CC="${CC}"
+		export OMPI_FC="${FC}"
+	fi
 }
 
 post_install() {