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

Calculating dependencies ... done!
Dependency resolution took 1.03 s (backtrack: 0/20).

[ebuild  N     ] acct-group/tss-0-r3::gentoo  0 KiB
[ebuild  N     ] acct-group/pkcs11-0-r2::gentoo  0 KiB
[ebuild  N     ] acct-user/tss-0-r3::gentoo  0 KiB
[ebuild  N     ] app-crypt/trousers-0.3.15-r1::gentoo  USE="-doc (-selinux)" 4590 KiB
[ebuild  N     ] dev-libs/opencryptoki-3.6.1-r1::gentoo  USE="tpm -debug" 1044 KiB

Total: 5 packages (5 new), Size of downloads: 5633 KiB