I'm trying to build a package for TOX (toxcore). It provides three dynamic libraries, two of which link to the third. I used ignore_unknown_shlibs=1 to bypass the error resulting from linking to a library that xbps-src does not know about. So far so good, but when xbps-src tries to create the actual package I get the warning

binpkg is being created, waiting for 1s...

over and over in an infinite loop. Up to and including the install stage there are no problems. Am I doing somethning conceptually wrong here? Other packages are beeing created just fine.