Create an ebuild for KDE 1. Make sure it can be installed and used alongside KDE Plasma 5.
In October 2016, for KDE's 20th birthday, KDE 1 was fixed and re-released to work on a modern system:
KDE Project releases KDE 1 !
POSTED BY HELIOCASTRO/ 10/13/2016
https://www.heliocastro.info/?p=291
http://www.heliocastro.info/wp-content/uploads/2016/10/desktop2.png
http://www.heliocastro.info/wp-content/uploads/2016/10/desktop1-1.png
https://en.wikipedia.org/wiki/K_Desktop_Environment_1
git clone git://anongit.kde.org/qt1
git clone git://anongit.kde.org/kde1-kdelibs