diff --git a/oci-builder/Containerfile b/oci-builder/Containerfile
index b70c7d2..b84b117 100644
--- a/oci-builder/Containerfile
+++ b/oci-builder/Containerfile
@@ -22,7 +22,7 @@ RUN set -eo pipefail; getcap -r / | awk '{ print $1 }' | xargs -I '{}' sh -c "se
 
 RUN setcap cap_setuid=ep /usr/bin/newuidmap cap_setgid=ep /usr/bin/newgidmap
 
-RUN shopt -s dotglob && rm -rf /var/cache/* /tmp/* /var/tmp/*
+RUN find /var/cache/ /tmp/ /var/tmp/ -mindepth 1 -delete
 
 COPY entrypoint.sh /entrypoint.sh