Try to install enstools with pip.

templates/build_enstools.sh

@@ -6,10 +6,9 @@ SPACK_URL=%spack.url%
 SPACK_BRANCH=%spack.branch%
 SPACK_COMPILER=%spack.compiler%
 
-
 # If the workdir directory does not exist create it
-if [ ! -d ${WORKDIR} ] ; then
-        mkdir -p ${WORKDIR}
+if [ ! -d ${WORKDIR} ]; then
+  mkdir -p ${WORKDIR}
 fi
 
 # Go to the working directory
@@ -17,7 +16,7 @@ cd ${WORKDIR}
 
 # Check if experiment's spack installation already exists, if it doesn't, clone it.
 SPACK_ENV=spack/share/spack/setup-env.sh
-if [ ! -f ${SPACK_ENV} ] ; then
+if [ ! -f ${SPACK_ENV} ]; then
   git clone ${SPACK_URL} -b ${SPACK_BRANCH}
   #TODO: Would be good to enable the re-utilization of existing spack packages (via packages.yaml or upstreams.yaml)
 fi
@@ -25,16 +24,30 @@ fi
 # Setup the environment
 source ${SPACK_ENV}
 
-
-if [ $( spack find py-enstools-compression &> /dev/null ; echo $? ) -ne 0 ]; then
-        echo "Installing enstools-compression."
-        # Compile openmpi with schedulers=slurm
-        spack install py-enstools-compression
+# Use spack to get a recent enough version of python3
+if [ $(
+  spack find python@3.8: &>/dev/null
+  echo $?
+) -ne 0 ]; then
+  echo "Installing a version of python3"
+  # Compile openmpi with schedulers=slurm
+  spack install python3@3.8:
 else
-        echo "py-enstools-compression already installed!"
+  echo "py-enstools-compression already installed!"
 fi
 
 # Link the python binary into the main folder so can be easily used later:
 
-spack load py-enstools-compression
-ln -sf $(which python3) ${WORKDIR}/python3
\ No newline at end of file
+spack load python@3.8:
+
+# Create virtual environment
+python3 -m venv --prompt AS venv
+
+# Load environment
+source venv/bin/activate
+
+# Create a link to the binary
+ln -sf $(which python3) ${WORKDIR}/python3
+
+# Install enstools-compression via pip
+pip install enstools-compression