"Don't know how to install packages on this system" is confusing
When I ran jhbuild sysdeps --install
while setting up jhbuild, I got the error message “Don't know how to install packages on this system”. It turned out that I was missing PackageKit (I use Fedora, so Apt and Pacman are not options for me) and when I installed it the problem was solved but I needed to read the jhbuild source to find out what was missing. I think an error message that suggests installing PackageKit may be more helpful.
Edited by Çağatay Yiğit Şahin