@Semwize: I was basing my answer on
https://www.mobileread.com/forums/sh...3&postcount=23, where the error message somewhat implies an "outdated" NM (although the actual error message may not be entirely too helpful on that front, ping @geek1011 ;p).
EDIT: Which is indeed the exact error I get when running the last NM release, as opposed to a build from the `elipsa` branch that features the new option

.