I would doubt that the fork will run on a NSLU. The guy made the code really for himself and the portability is not (yet?) really high.
For instance I tried to compile the mt-daapd fork. First I had to install antlr and a few other dependencies. Some work but in the end straightforward to do. And as antlr seems to be a java tool there already it ends for the NSLUs as well I am afraid.
With my miniPC based on a VIA CPU and gentoo distribution I did not come much further though. After installing all dependencies I get now in the configure run
checking avl.h usability… no
checking avl.h presence… no
checking for avl.h… no
configure: error: avl.h not found
Doing a google search does not really reveal the package that belongs to. And a configure run should not bark out just with a missing header file error. There seems to be something either bugged or highly distribution dependant.