$ make help
Usage:
make <target>
Targets:
18.10 Build Centreon 18.10
19.04 Build Centreon 19.04
19.04-centos Build Centreon 19.04 over Centos ISO
19.10 Build Centreon OSS 19.10 over Centos ISO
20.04 Build Centreon OSS 20.04 over Centos ISO
20.10 Build Centreon OSS 20.10 over Centos ISO
last Build last version available (20.10)