diff --git a/docker/Dockerfile b/docker/Dockerfile
index 6455450..cdb80f7 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,89 +1,90 @@
 FROM python:3.7
 
 ARG PGDG_REPO=http://apt.postgresql.org/pub/repos/apt
 ARG PGDG_GPG_KEY=https://www.postgresql.org/media/keys/ACCC4CF8.asc
 ARG PGDG_KEYRING=/usr/share/keyrings/pgdg-archive-keyring.gpg
 
 ARG NODE_REPO=https://deb.nodesource.com/node_12.x
 ARG NODE_GPG_KEY=https://deb.nodesource.com/gpgkey/nodesource.gpg.key
 ARG NODE_KEYRING=/usr/share/keyrings/nodejs-archive-keyring.gpg
 
 ARG YARN_REPO=https://dl.yarnpkg.com/debian/
 ARG YARN_GPG_KEY=https://dl.yarnpkg.com/debian/pubkey.gpg
 ARG YARN_KEYRING=/usr/share/keyrings/yarnpkg-archive-keyring.gpg
 
 RUN . /etc/os-release && \
   echo "deb [signed-by=${PGDG_KEYRING}] ${PGDG_REPO} ${VERSION_CODENAME}-pgdg main" \
   > /etc/apt/sources.list.d/pgdg.list && \
   curl -fsSL ${PGDG_GPG_KEY} | gpg --dearmor > ${PGDG_KEYRING} && \
   echo "deb [signed-by=${NODE_KEYRING}] ${NODE_REPO} ${VERSION_CODENAME} main" \
   > /etc/apt/sources.list.d/nodejs.list && \
   curl -fsSL ${NODE_GPG_KEY} | gpg --dearmor > ${NODE_KEYRING} && \
   echo "deb [signed-by=${YARN_KEYRING}] ${YARN_REPO} stable main" \
   > /etc/apt/sources.list.d/yarnpkg.list && \
   curl -fsSL ${YARN_GPG_KEY} | gpg --dearmor > ${YARN_KEYRING}
 
 # warning: the py:3.7 image comes with python3.9 installed from debian; do not
 # add debian python packages here, they would not be usable for the py37 based
 # environment used in this image.
 RUN export DEBIAN_FRONTEND=noninteractive && \
   apt-get update && apt-get upgrade -y && \
   apt-get install -y \
   libapr1-dev \
   libaprutil1-dev \
   libcmph-dev \
   libpq-dev \
   librdkafka-dev \
   libsvn-dev \
   libsystemd-dev \
   gcc \
   openjdk-11-jre \
   pkg-config \
   pv \
   postgresql-client-12 \
   wait-for-it \
   ngrep \
   rsync \
   nodejs \
   yarn \
   zstd && \
   apt-get install -y --no-install-recommends \
   opam \
   r-base-core \
   r-cran-jsonlite && \
   apt-get clean && \
   rm -rf /var/lib/apt/lists/*
 
 RUN useradd -md /srv/softwareheritage -s /bin/bash swh
 USER swh
 
 RUN python3 -m venv /srv/softwareheritage/venv
 ENV PATH="/srv/softwareheritage/venv/bin:${PATH}"
 
 RUN pip install --upgrade pip setuptools wheel
 RUN pip install gunicorn httpie
 # cython and configjob are required to install the breeze (bzr) package
 RUN pip install cython configobj
 
 RUN pip install \
   swh-core[db,http] \
   swh-counters \
   swh-deposit[server] \
   swh-indexer \
   swh-journal \
   swh-lister \
   swh-loader-core \
   swh-loader-bzr \
   swh-loader-cvs \
   swh-loader-git \
   swh-loader-mercurial \
+  swh-loader-metadata \
   swh-loader-svn \
   swh-storage \
   swh-objstorage \
   swh-scheduler \
   swh-vault \
   swh-web
 
 COPY utils/*.sh /srv/softwareheritage/utils/
 RUN mkdir -p /srv/softwareheritage/objects
 RUN rm -rd /srv/softwareheritage/.cache