diff --git a/inference/worker.sh b/inference/worker.sh
index bdd0476..410b65e 100755
--- a/inference/worker.sh
+++ b/inference/worker.sh
@@ -38,6 +38,10 @@ LogDir=${LOGDIR}
 
 . "$ParameterFile"
 
+# Prefer OpenFoldDir if set; otherwise use repo root relative to this script.
+PYFIX_DIR="${OpenFoldDir:-$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." &>/dev/null && pwd)}/pyfix"
+export PYTHONPATH="${PYFIX_DIR}:${PYTHONPATH:-}"
+
 export LD_PRELOAD=/usr/lib/FJSVtcs/ple/lib64/libpmix.so:$LD_PRELOAD
 
 ulimit -s 16384
diff --git a/making_pyfix.sh b/making_pyfix.sh
new file mode 100755
index 0000000..b8e2413
--- /dev/null
+++ b/making_pyfix.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+set -eu
+
+mkdir -p ./pyfix
+
+cat > ./pyfix/sitecustomize.py <<'PY'
+import distutils.version  # ensure distutils.version attribute exists
+PY
+
+echo "[OK] wrote ./pyfix/sitecustomize.py"
diff --git a/pyfix/sitecustomize.py b/pyfix/sitecustomize.py
new file mode 100644
index 0000000..029359c
--- /dev/null
+++ b/pyfix/sitecustomize.py
@@ -0,0 +1 @@
+import distutils.version  # ensure distutils.version attribute exists
diff --git a/scripts/install_fugaku_others.sh b/scripts/install_fugaku_others.sh
index fe5fee5..48ca8b2 100755
--- a/scripts/install_fugaku_others.sh
+++ b/scripts/install_fugaku_others.sh
@@ -132,7 +132,20 @@ popd
 
 # mpi4py
 #env MPICC=`which mpifcc` pip3 install mpi4py
-env MPICFG="fujitsu-mpi" pip3 install mpi4py==3.1.4
+#env MPICFG="fujitsu-mpi" pip3 install mpi4py==3.1.4
+
+# mpi4py
+#export SETUPTOOLS_USE_DISTUTILS=stdlib
+#pip3 install -U "pip<24.1" "setuptools<70" "wheel"
+#env MPICFG=fujitsu-mpi MPICC=/opt/FJSVxtclanga/tcsds-1.2.42/bin/mpifcc \
+#  pip3 install --no-build-isolation mpi4py==3.1.4
+
+# mpi4py
+export SETUPTOOLS_USE_DISTUTILS=stdlib
+pip3 install -U "pip<24.1" "setuptools<70" "wheel"
+
+env MPICFG="fujitsu-mpi" MPICC="$(which mpifcc)" \
+  pip3 install --no-build-isolation mpi4py==3.1.4
 
 # OpenFold
 pushd $OPENFOLDDIR