Alfred Agrell (@Alcaro) commented about tools/gitlab/image-amd64.docker:
libxcursor-dev:amd64 libxcursor-dev:i386 \
libxext-dev:amd64 libxext-dev:i386 \
libxi-dev:amd64 libxi-dev:i386 \
libxinerama-dev:amd64 libxinerama-dev:i386 \
libxkbcommon-dev:amd64 libxkbcommon-dev:i386 \
libxkbregistry-dev:amd64 libxkbregistry-dev:i386 \
libxrandr-dev:amd64 libxrandr-dev:i386 \
libxrender-dev:amd64 libxrender-dev:i386 \
libxxf86vm-dev:amd64 libxxf86vm-dev:i386 \
linux-libc-dev:amd64 linux-libc-dev:i386 \
lld \
llvm \
mesa-vulkan-drivers:amd64 mesa-vulkan-drivers:i386 \
netbase \
ocl-icd-opencl-dev:amd64 ocl-icd-opencl-dev:i386 \
perl \
I'm pretty sure Perl is installed on every Debian.
But being explicit about dependencies always helps. Let's keep it.