Index: /issm/trunk-jpl/externalpackages/petsc/install-3.15-discovery.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/petsc/install-3.15-discovery.sh	(revision 26992)
+++ /issm/trunk-jpl/externalpackages/petsc/install-3.15-discovery.sh	(revision 26993)
@@ -21,21 +21,23 @@
 cd src
 ./config/configure.py \
-        COPTFLAGS="-g -O3" CXXOPTFLAGS="-g -O3" FOPTFLAGS="-g -O3" \
-		  --with-make-np=20 \
-        --with-blas-lapack-dir=$MKL_ROOT \
-        --with-mpi-dir="/optnfs/el7/mpich/3.3-intel19.3/" \
-        --known-mpi-shared-libraries=1 \
-        --known-mpi-long-double=1 \
-        --known-mpi-int64_t=1 \
-        --known-mpi-c-double-complex=1 \
-        --with-debugging=0 \
-        --with-valgrind=0 \
-        --with-x=0 \
-        --with-ssl=0 \
-        --with-pic=1 \
-        --download-metis=1 \
-        --download-parmetis=1 \
-        --download-scalapack=1 \
-        --download-mumps=1
+	COPTFLAGS="-g -O3" CXXOPTFLAGS="-g -O3" FOPTFLAGS="-g -O3" \
+	--prefix="${ISSM_DIR}/externalpackages/petsc/install" \
+	--PETSC_DIR="${ISSM_DIR}/externalpackages/petsc/src" \
+	--with-make-np=20 \
+	--with-blas-lapack-dir=$MKL_ROOT \
+	--with-mpi-dir="/optnfs/el7/mpich/3.3-intel19.3/" \
+	--known-mpi-shared-libraries=1 \
+	--known-mpi-long-double=1 \
+	--known-mpi-int64_t=1 \
+	--known-mpi-c-double-complex=1 \
+	--with-debugging=0 \
+	--with-valgrind=0 \
+	--with-x=0 \
+	--with-ssl=0 \
+	--with-pic=1 \
+	--download-metis=1 \
+	--download-parmetis=1 \
+	--download-scalapack=1 \
+	--download-mumps=1
 
 # Compile and install