Experiences with #dreckly / #pkgsrc on obscure Unixes:
#UnixWare - bootstrap succeeded! Just needed a few simple fixes.
#OpenServer - see UnixWare.
#BSDOS - kernel panic during installation. Support incomplete.
#HPUX - kernel panic during installation.
#QNX - bootstrap success! No changes needed.
#Haiku - bootstrap failed due to open() behaviour. "Invalid argument".
If you have a shell on an #IRIX or #HPUX machine, please let me know!