diff --git a/docker/matrix-eavesdrop/Dockerfile b/docker/matrix-eavesdrop/Dockerfile
index e64c6846f6..52cee9a7e5 100644
--- a/docker/matrix-eavesdrop/Dockerfile
+++ b/docker/matrix-eavesdrop/Dockerfile
@@ -15,7 +15,6 @@
 
 FROM docker.io/opendevorg/python-builder:3.9 as builder
 RUN echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list
-# ENV DEBIAN_FRONTEND=noninteractive
 
 COPY src /tmp/src
 RUN assemble