I didn’t find on the README enough informations (about which dir to use and what to do once inside), but found some on a random blog on the web [0], and now built it but it seems it only installed executable binary stuff under the name of “squeak”, is this normal? are you sure it’s not related to the “squeak-vm” debian package?
[0] https://pharoweekly.wordpress.com/2017/02/23/building-pharo-vm-as-simple-as/