net-firewall/psad has historically done a config file update to set the system's hostname in psad.conf, which occurs in src_install. This should be done in pkg_preinst such that binary packages do not use the build host's hostname in the default config. Steps to reproduce: 1. binpkg net-firewall/psad 2. ???? 3. MONETARY LOSS!
Fixed in 2.1.5-r2.