It hangs here:
[14:55:51] Scenario: /home/maikel/games/clonk_rage/./ClonkMars.c4f/01_Fossae.c4s
[14:55:51] Scenario uses specified object definitions.
[14:55:51] Loading extras...
[14:55:51] Importing skinpacket from /home/maikel/games/clonk_rage/./Extra.c4g\ClonkMars.c4d...
[14:55:51] Loading graphics...
Probably due to the backslash after Extra.c4g.