Great, this is really it! I didn't have flex installed, which caused my "loader.c" file to get replaced by an empty (!) file during make. Now after installing flex and re-checkout it works. Thank you Gros for pointing this out. Now I wonder, this has to be a bug in the build logic, no? When I don't have flex installed, why doesn't the "loader.c" file simply gets used as it is? At least this is how it used to work, because I've never installed flex before. AndreasV