diff --git a/Dockerfile b/Dockerfile
index acee5f3..81c9e2d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,7 @@ RUN DEBIAN_FRONTENT=noninteractive && \
   libpgobject-util-dbmethod-perl libplack-perl libtemplate-perl \
   libnamespace-autoclean-perl \
   libtemplate-plugin-latex-perl libtex-encode-perl \
+  libmoosex-nonmoose-perl \
   texlive-latex-recommended \
   texlive-xetex \
   starman \
@@ -60,6 +61,9 @@ RUN chown www-data /etc/ssmtp /etc/ssmtp/ssmtp.conf && \
   chmod +x /usr/local/bin/update_ssmtp.sh /usr/local/bin/start.sh && \
   mkdir -p /var/www
 
+# Work around an aufs bug related to directory permissions:
+RUN mkdir -p /tmp && \
+  chmod 1777 /tmp
 
 # Internal Port Expose
 EXPOSE 5762