diff --git a/Dockerfile b/Dockerfile
index f0f52a81fd3bf7f93ed4605d92ad60f2b6ceccde..76fab17a76d6136d77a92a7291b94aeacf52f19a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,3 +3,7 @@ FROM debian:9
 RUN apt-get update \
   && apt-get install -y git subversion python build-essential gawk unzip libz-dev libncurses-dev libssl-dev time curl wget ecdsautils \
   && apt-get clean
+
+# gluon build fails when running as root
+RUN adduser --quiet --disabled-login --gecos '' build
+USER build:build