Lately I decided to build the Eclipse IDE from scratch - so I have the freedom to tweak it to my needs. The very first action I\'m taking is enlarging the icons. Even the newest
If you want to build a specific package (for example the IDE for C/C++ Developers package), clone https://git.eclipse.org/r/epp/org.eclipse.epp.packages
and then look at the README.md
file - it has instructions for building locally.
Technically speaking, that's not building the "barebones" platform and then adding in features and plug-ins on your own, but I think you'll find this a much easier first step to get towards your goal (whatever that is).