diff --git a/release/oci/Dockerfile b/release/oci/Dockerfile
index e56e8b1f..38aedada 100644
--- a/release/oci/Dockerfile
+++ b/release/oci/Dockerfile
@@ -6,8 +6,8 @@
 
 FROM python:3.11-slim-bookworm
 
-ENV DEBIAN_FRONTEND noninteractive
-ENV TERM linux
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TERM=linux
 
 # Install Git, it is needed for `versioningit`.
 RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache