`make buster-base` happy
```
$ make base-buster
grep '^FROM \$REGISTRY/' base-buster/Dockerfile cypress/Dockerfile kafka/Dockerfile sphinx/Dockerfile tox/Dockerfile | \
awk -F '/Dockerfile:FROM \\$REGISTRY/' '{ print $1 " " $2 }' | \
sed 's@[:/]@\\:@g' | awk '{ print "swh-jenkins/" $1 ": " "swh-jenkins/" $2 }' > .depends.mk
docker build -t swh-jenkins/base-buster base-buster
[+] Building 57.6s (12/21)
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 6.83kB 0.0s
=> resolve image config for docker.io/docker/dockerfile:experimental 1.9s
=> docker-image://docker.io/docker/dockerfile:experimental@sha256:de85b2f3a3e8a2f7fe48e8e84a65f6fdd5cd5183afa6412fff9caa6871649c44 2.3s
=> => resolve docker.io/docker/dockerfile:experimental@sha256:de85b2f3a3e8a2f7fe48e8e84a65f6fdd5cd5183afa6412fff9caa6871649c44 0.0s
=> => sha256:de85b2f3a3e8a2f7fe48e8e84a65f6fdd5cd5183afa6412fff9caa6871649c44 1.69kB / 1.69kB 0.0s
=> => sha256:8c69d118cfcd040a222bea7f7d57c6156faa938cb61b47657cd65343babc3664 521B / 521B 0.0s
=> => sha256:08fb2b2ca3d58e19d791e73dea16126df37608115532e748d63525688df457a5 897B / 897B 0.0s
=> => sha256:61261561661960014533790f5d6c42f5b88362db7e005f35248c20f075900a61 8.88MB / 8.88MB 1.9s
=> => extracting sha256:61261561661960014533790f5d6c42f5b88362db7e005f35248c20f075900a61 0.3s
=> [internal] load .dockerignore 0.0s
=> [internal] load build definition from Dockerfile 0.0s
[+] Building 299.4s (22/22) FINISHED
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 6.83kB 0.0s
=> resolve image config for docker.io/docker/dockerfile:experimental 1.9s
=> docker-image://docker.io/docker/dockerfile:experimental@sha256:de85b2f3a3e8a2f7fe48e8e84a65f6fdd5cd5183afa6412fff9caa6871649c44 2.3s
=> => resolve docker.io/docker/dockerfile:experimental@sha256:de85b2f3a3e8a2f7fe48e8e84a65f6fdd5cd5183afa6412fff9caa6871649c44 0.0s
=> => sha256:de85b2f3a3e8a2f7fe48e8e84a65f6fdd5cd5183afa6412fff9caa6871649c44 1.69kB / 1.69kB 0.0s
=> => sha256:8c69d118cfcd040a222bea7f7d57c6156faa938cb61b47657cd65343babc3664 521B / 521B 0.0s
=> => sha256:08fb2b2ca3d58e19d791e73dea16126df37608115532e748d63525688df457a5 897B / 897B 0.0s
=> => sha256:61261561661960014533790f5d6c42f5b88362db7e005f35248c20f075900a61 8.88MB / 8.88MB 1.9s
=> => extracting sha256:61261561661960014533790f5d6c42f5b88362db7e005f35248c20f075900a61 0.3s
=> [internal] load .dockerignore 0.0s
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 6.83kB 0.0s
=> [internal] load metadata for docker.io/library/openjdk:11-jdk-slim-buster 0.7s
=> [stage-0 1/12] FROM docker.io/library/openjdk:11-jdk-slim-buster@sha256:333d2ca9faae137e2dedde915a308cbb5bb32d2efcfd2593f65c6bb5946a6c1a 42.5s
=> => resolve docker.io/library/openjdk:11-jdk-slim-buster@sha256:333d2ca9faae137e2dedde915a308cbb5bb32d2efcfd2593f65c6bb5946a6c1a 0.0s
=> => sha256:50a4ef013cdb7c527bf496dfa3228c8ad07ba402537de11bbaebc0487958bd7a 5.98kB / 5.98kB 0.0s
=> => sha256:852e50cd189dfeb54d97680d9fa6bed21a6d7d18cfb56d6abfe2de9d7f173795 27.11MB / 27.11MB 9.0s
=> => sha256:ef17c1a944643971956760785cd2fdb1ae360b47af01d997bd7580f32b8b3512 3.25MB / 3.25MB 2.1s
=> => sha256:4775893594119b57be5f76b0160b978dc709123103de89c530075323fcac79ef 212B / 212B 0.7s
=> => sha256:333d2ca9faae137e2dedde915a308cbb5bb32d2efcfd2593f65c6bb5946a6c1a 549B / 549B 0.0s
=> => sha256:a352763351f70b502a2f27e97462a335b524b8d1ddc34abb4f33f9dba4079feb 1.16kB / 1.16kB 0.0s
=> => sha256:0a40767d8190b6815d83776473d30e5fc01c420f4afc4bad4930f0d265173684 197.12MB / 197.12MB 37.2s
=> => extracting sha256:852e50cd189dfeb54d97680d9fa6bed21a6d7d18cfb56d6abfe2de9d7f173795 1.4s
=> => extracting sha256:ef17c1a944643971956760785cd2fdb1ae360b47af01d997bd7580f32b8b3512 0.2s
=> => extracting sha256:4775893594119b57be5f76b0160b978dc709123103de89c530075323fcac79ef 0.0s
=> => extracting sha256:0a40767d8190b6815d83776473d30e5fc01c420f4afc4bad4930f0d265173684 5.0s
=> [internal] helper image for file operations 2.2s
=> => resolve docker.io/docker/dockerfile-copy:v0.1.9@sha256:e8f159d3f00786604b93c675ee2783f8dc194bb565e61ca5788f6a6e9d304061 1.5s
=> => sha256:e8f159d3f00786604b93c675ee2783f8dc194bb565e61ca5788f6a6e9d304061 2.03kB / 2.03kB 0.0s
=> => sha256:a546a4352bcaa6512f885d24fef3d9819e70551b98535ed1995e4b567ac6d05b 736B / 736B 0.0s
=> => sha256:494e63343c3f0d392e7af8d718979262baec9496a23e97ad110d62b9c90d6182 766B / 766B 0.0s
=> => sha256:df3b4bed1f63b36992540a09e0d10bd3f9d0b082d50810313841d745d7cce368 898.21kB / 898.21kB 1.3s
=> => extracting sha256:df3b4bed1f63b36992540a09e0d10bd3f9d0b082d50810313841d745d7cce368 0.3s
=> => sha256:f7b6696c3fee7264ec4486cebe146a6a98aa8d1e46747843107ff473aada8d56 861.00kB / 861.00kB 1.9s
=> => extracting sha256:f7b6696c3fee7264ec4486cebe146a6a98aa8d1e46747843107ff473aada8d56 0.2s
=> [internal] load build context 0.0s
=> => transferring context: 4.63kB 0.0s
=> [stage-0 2/12] RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache 0.4s
=> [stage-0 3/12] RUN echo 'Explanation: profile: elasticsearch\nPackage: elasticsearch elasticsearch-oss\nPin: version 7.9.3\nPin-Priority: 1001' > /etc/apt/preferences.d/elasticsearch.pref 0.5s
=> [stage-0 4/12] RUN --mount=type=cache,id=apt-cache,target=/var/cache/apt --mount=type=cache,id=apt-lists,target=/var/lib/apt export DEBIAN_FRONTEND=noninteractive && apt-get update && apt-get install -y apt-transport-ht 236.2s
=> [stage-0 5/12] RUN groupadd -g 120 jenkins 0.5s
=> [stage-0 6/12] RUN groupadd -g 999 docker 0.4s
=> [stage-0 7/12] RUN useradd -c "Jenkins user" -d /home/jenkins -u 115 -g 120 -m jenkins 0.5s
=> [stage-0 8/12] RUN gpasswd -a jenkins docker 0.5s
=> [stage-0 9/12] RUN curl --create-dirs -fsSLo /usr/share/jenkins/agent.jar https://repo.jenkins-ci.org/public/org/jenkins-ci/main/remoting/3.35/remoting-3.35.jar && chmod 755 /usr/share/jenkins && chmod 644 /usr/share/jenkin 1.0s
=> [stage-0 10/12] RUN mkdir /home/jenkins/.jenkins && mkdir -p /home/jenkins/agent 0.6s
=> [stage-0 11/12] COPY jenkins-agent /usr/local/bin/jenkins-agent 0.3s
=> [stage-0 12/12] RUN chmod +x /usr/local/bin/jenkins-agent && ln -s /usr/local/bin/jenkins-agent /usr/local/bin/jenkins-slave 0.4s
=> exporting to image 10.2s
=> => exporting layers 10.2s
=> => writing image sha256:4f76a4be5752c888fd4fa3c7ba626410521dd090b29d818e8df94402107b6c0c 0.0s
=> => naming to docker.io/swh-jenkins/base-buster 0.0s
```