These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.24 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/uthash-2.4.0::gentoo  USE="-test" 192 KiB
[ebuild  N     ] acct-group/burp-0-r3::gentoo  0 KiB
[ebuild  N     ] net-libs/librsync-2.3.4:0/2.2::gentoo  197 KiB
[ebuild  N     ] acct-user/burp-0-r3::gentoo  0 KiB
[ebuild  N     ] app-backup/burp-3.3.0-r1::gentoo  USE="acl xattr -test -verify-sig" 693 KiB

Total: 5 packages (5 new), Size of downloads: 1081 KiB