I should point out that I compiled all 3rd party drivers. Then I also cloned the KStars code from github and compiled KStars following the instructions here
Both compilations finish perfectly well. INDI reports that all drivers are present, KStars reports that it can find the INDI development libraries. Great!
However, when I start Ekos and use the Simulators profile, KStars crashes with a segmentation fault. See the attached log, which I obtained by running KStars from the command line. Do the warnings about the missing QtQuick modules mean that I need to install more libraries? If yes, which one(s)?