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

Calculating dependencies ... done!
Dependency resolution took 0.86 s (backtrack: 1/20).


!!! All ebuilds that could satisfy ">=net-analyzer/fping-2.2_beta1" have been masked.
!!! One of the following masked packages is required to complete your request:
- net-analyzer/fping-5.4::gentoo (masked by: fping license(s))
A copy of the 'fping' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/fping'.

- net-analyzer/fping-5.3::gentoo (masked by: fping license(s))
- net-analyzer/fping-5.2::gentoo (masked by: fping license(s))
- net-analyzer/fping-5.1-r1::gentoo (masked by: fping license(s))

(dependency required by "dev-perl/Mon-0.110.0-r3::gentoo" [ebuild])
(dependency required by "=dev-perl/Mon-0.110.0-r3" [argument])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.