On Dienstag, 31. Juli 2018 21:24:54 CEST MK wrote: [...]
make[1]: Verzeichnis „/lib/modules/4.9.0-7-amd64/build“ wird betreten make[1]: *** Keine Regel, um „modules“ zu erstellen. Schluss.
[...]
This is a debian stretch installation. Someone out there with the same problem? Make clean did not help.
Looks like your kernel sources are missing the rules to build modules. Please install the correct packages.
Kind regards, Sven