Hi cosminbro
The following assumes your home directory is /home/tc. Change it
to match your home directory if different.
Make sure you have squashfs-tools.tcz installed.
When you run the make command, include a DESTDIR. For example:
make DESTDIR=/home/tc/pkg --with-alsa blah blah blah
The program files should be installed under /home/tc/pkg.
Then:
cd
mksquashfs pkg shairport.tcz -noappend