Hi. I got new information.
I am sorry but latest version of ERP5 is currently not building.
Our build test of ERP5 into a Debian Stretch OS is currently failing :
You can track all our tests on this page:
https://stack.nexedi.com/test_status?fbclid=IwAR0tnOIWOPn3ksRLnQES06zBe5yYNBffK3c8FwB502BGn2VG1yFZr_5nCdw
We are now fixing the build test of ERP5 on Debian. Until it is fixed, ERP5 will not build.