diff --git a/buildd.df b/buildd.df
index 1bcc2a9..399543d 100644
--- a/buildd.df
+++ b/buildd.df
@@ -8,5 +8,7 @@ FROM  ${DEVUAN_IMAGE}
 LABEL maintainer="Olaf Meeuwissen <paddy-hack@member.fsf.org>"
 
 RUN apt-get update -q \
-    && apt-get install build-essential -q -y \
+    && DEBIAN_FRONTEND=noninteractive \
+       apt-get install -q -y \
+               build-essential \
     && remove-apt-lists