diff --git a/lektor/docker/entrypoint.sh b/lektor/docker/entrypoint.sh
index e37f8f2..114b848 100644
--- a/lektor/docker/entrypoint.sh
+++ b/lektor/docker/entrypoint.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+export PYTHONPYCACHEPREFIX=/tmp
+
 sh -c ". /opt/venv/bin/activate && exec python /opt/lektor/scripts/calendar-fetcher.py ${CALENDAR_URL} > /opt/lektor/project/content/termine/contents.lr"
 # TODO As the file reads from the same file as it's output is afterwards piped into this leads to synchronization/buffering issues, we therefore write to a temporaray file and move it to the right place in a subsequent step
 tempfile=$(mktemp)