If you try to run bin/gimp from CLI without having launched Gimp.app before, it fails. The problem is that "/tmp/skl/" directory don't exists and so it don't find both "dbus-lunch" and "gimp-2.6" executables in PATH, and of course the needed symlinks.
If you manually lunch Gimp.app, the directory is created and following invocations of bin/gimp succeeds. As I'm using Gimp for an automated assets building pipeline, this is impractical.
It's hard to update bin/gimp script so that it can create the needed directory and symlinks if missing?