--- a/taskcluster/docker/debian-base/Dockerfile
+++ b/taskcluster/docker/debian-base/Dockerfile
@@ -46,23 +46,26 @@ COPY setup_packages.sh /usr/local/sbin/
 COPY cloud-mirror-workaround.sh /usr/local/sbin/
 
 # %ARG DOCKER_IMAGE_PACKAGES
 RUN /usr/local/sbin/setup_packages.sh $DOCKER_IMAGE_PACKAGES && \
     echo 'dir::bin::methods::https "/usr/local/sbin/cloud-mirror-workaround.sh";' > /etc/apt/apt.conf.d/99cloud-mirror-workaround && \
     apt-get update && \
     apt-get install \
       git \
+      less \
       make \
       mercurial \
+      patch \
       python \
       python3.5 \
       python3-minimal \
       python-zstandard \
       python3-zstandard \
+      vim-tiny \
       xz-utils
 
 # %include testing/mozharness/external_tools/robustcheckout.py
 COPY topsrcdir/testing/mozharness/external_tools/robustcheckout.py /usr/local/mercurial/robustcheckout.py
 
 # %include taskcluster/docker/recipes/hgrc
 COPY topsrcdir/taskcluster/docker/recipes/hgrc /etc/mercurial/hgrc.d/mozilla.rc