diff --git a/base/Dockerfile b/base/Dockerfile
deleted file mode 100644
index 4350944..0000000
--- a/base/Dockerfile
+++ /dev/null
@@ -1,44 +0,0 @@
-FROM jenkins/jnlp-slave
-LABEL maintainer="SoftwareHeritage"
-USER root
-
-RUN \
-  export DEBIAN_FRONTEND=noninteractive && \
-  apt-get update && \
-  apt-get install -y apt-transport-https && \
-  echo deb http://deb.debian.org/debian/ stretch-backports main > /etc/apt/sources.list.d/backports.list && \
-  echo deb http://apt.postgresql.org/pub/repos/apt/ stretch-pgdg main > /etc/apt/sources.list.d/postgres.list && \
-  wget --quiet -O /etc/apt/trusted.gpg.d/postgresql.asc https://www.postgresql.org/media/keys/ACCC4CF8.asc && \
-  echo deb https://dl.yarnpkg.com/debian/ stable main > /etc/apt/sources.list.d/yarnpkg.list && \
-  wget --quiet -O /etc/apt/trusted.gpg.d/yarnpkg.asc https://dl.yarnpkg.com/debian/pubkey.gpg && \
-  echo deb https://artifacts.elastic.co/packages/7.x/apt stable main > /etc/apt/sources.list.d/elastic-7.x.list && \
-  wget --quiet -O /etc/apt/trusted.gpg.d/elastic.asc https://artifacts.elastic.co/GPG-KEY-elasticsearch && \
-  echo deb http://www.apache.org/dist/cassandra/debian 311x main > /etc/apt/sources.list.d/cassandra.list && \
-  wget --quiet -O /etc/apt/trusted.gpg.d/cassandra.asc https://www.apache.org/dist/cassandra/KEYS && \
-  apt-get update && \
-  apt-get upgrade -y && \
-  apt-get install -y -t stretch-backports \
-    nodejs && \
-  apt-get install -y \
-    arcanist \
-    build-essential \
-    cassandra \
-    curl \
-    jq \
-    libffi-dev \
-    libsvn-dev \
-    libsystemd-dev \
-    pkg-config \
-    postgresql-10 \
-    postgresql-client-10 \
-    postgresql-server-dev-10 \
-    elasticsearch \
-    python3-dev \
-    python3-pip \
-    python3-venv \
-    yarn \
-  && \
-  apt-get clean && \
-  rm -rf /var/lib/apt/lists/*
-
-USER jenkins
diff --git a/tox-stretch/Dockerfile b/tox-stretch/Dockerfile
deleted file mode 100644
index ba3d709..0000000
--- a/tox-stretch/Dockerfile
+++ /dev/null
@@ -1,10 +0,0 @@
-ARG REGISTRY=swh-jenkins
-FROM $REGISTRY/base
-LABEL maintainer="SoftwareHeritage"
-
-USER jenkins
-
-RUN python3 -m pip install --user --upgrade \
-  pip setuptools wheel twine tox detox
-RUN python3 -m pip install --user --no-warn-script-location \
-  Radon pylint coverage codespell pyarcanist