Yes, running make kstars does indeed work. Of course running make install fails, but that's no problem, I just copy kstars to the proper place and it works.
It seems that make install cannot be modified to be given a single target.
The truth is you don't even need to copy/install the kstars executable anywhere,
You can just run it from wherever it is compiled without any installation.
In Jerry's script, I believe that would be by typing this on the command line:
~/Projects/kstars-build/bin/kstars
That what I tend to do.
So it seems to be distribution dependent. I have no issue compiling it on my Pi4 running 64bit openSUSE Tumbleweed.
It has docbook_4 4.5 and docbook-xsl-stylesheets 1.79.2 installed. Maybe that's the difference?
Yes, we asked KDE Doc team to fix this and make it compile on older KDE KF5 framework version. The current documentation requires KF5 v5.92 which isn't yet available on older distributions.