diff --git a/docker/MTAContainerFile b/docker/MTAContainerFile
index e4f4e59..df41e00 100644
--- a/docker/MTAContainerFile
+++ b/docker/MTAContainerFile
@@ -58,7 +58,8 @@ RUN apt-get update -yqq && \
   openssl \
   sq \
   bind9-host \
-  inotify-tools
+  inotify-tools \
+  mailutils
 
 RUN adduser --shell /bin/bash --disabled-password --gecos "" hockeypuck
 
diff --git a/docker/mta_provision/usr/bin/prepare.sh b/docker/mta_provision/usr/bin/prepare.sh
index 5e4cdfc..cb6d990 100755
--- a/docker/mta_provision/usr/bin/prepare.sh
+++ b/docker/mta_provision/usr/bin/prepare.sh
@@ -18,17 +18,19 @@ else
   if [ "$BRANCH" != "" ] ; then
     git checkout $BRANCH
   fi
-  cargo build
+  ASSET_DIR=/tmp cargo build
 
   HUSK_BIN=/opt/husk/husk-milter/target/debug/husk
   HUSK_DIR=/opt/husk/husk-milter/
+
+  cp /tmp/shell_completions/husk.bash /etc/bash_completion.d/
 fi
 
 ## start rsyslogd
 /usr/sbin/rsyslogd -n -iNONE &
 
 ## start postfix
-sudo postfix start
+sudo postfix start > /dev/null
 
 ## start and prepare postgres
 DOMAINS="example.com"