INFO: setup
Package:    net-misc/unison-2.53.5:2.53
Repository: gentoo
Maintainer: ml@gentoo.org
Upstream:   https://github.com/bcpierce00/unison/issues
USE:        abi_x86_64 amd64 elibc_glibc kernel_linux ocamlopt
FEATURES:   preserve-libs sandbox userpriv usersandbox
INFO: install
Final size of build directory: 16628 KiB (16.2 MiB)
Final size of installed tree:   6380 KiB ( 6.2 MiB)
LOG: postinst
Unison now uses SLOTs, so you can specify servercmd=/usr/bin/unison-2.53
in your profile files to access exactly this version over ssh.
Or you can use 'eselect unison' to set the version.