octopus ~ # emerge -av munin

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

Calculating dependencies... done!
[ebuild N ] virtual/perl-Time-HiRes-1.972.500-r1 0 kB
[ebuild N ] dev-perl/List-MoreUtils-0.330.0 39 kB
[ebuild N ] dev-perl/HTML-Template-2.940.0 89 kB
[ebuild N ] dev-perl/File-Copy-Recursive-0.380.0 11 kB
[ebuild N ] dev-perl/Net-Netmask-1.901.600 18 kB
[ebuild N ] dev-perl/Net-CIDR-0.170.0 11 kB
[ebuild N ] dev-perl/Crypt-DES-2.50.0 16 kB
[ebuild N ] dev-perl/Socket6-0.230.0 57 kB
[ebuild N ] dev-perl/IO-Multiplex-1.130.0 16 kB
[ebuild N ] virtual/perl-Text-Balanced-2.20.0-r2 0 kB
[ebuild N ] virtual/perl-PodParser-1.510.0-r1 0 kB
[ebuild N ] dev-perl/Log-Log4perl-1.400.0 USE="{-test}" 267 kB
[ebuild N ] dev-perl/Digest-SHA1-2.130.0 0 kB
[ebuild N ] perl-core/Getopt-Long-2.390.0 0 kB
[ebuild N ] virtual/perl-Getopt-Long-2.390.0 0 kB
[ebuild N ] dev-perl/IO-Socket-INET6-2.690.0 19 kB
[ebuild N ] dev-perl/Net-SNMP-6.0.1 93 kB
[ebuild N ] dev-perl/net-server-2.7.0 USE="ipv6" 131 kB
[ebuild N ] net-analyzer/rrdtool-1.4.8 USE="graph perl python tcpd -dbi -doc -lua -rrdcgi -ruby -static-libs -tcl" PYTHON_TARGETS="python2_7" 1,348 kB
[ebuild N ] virtual/cron-0 0 kB
[ebuild N ] net-analyzer/munin-2.0.14 USE="ipv6 ssl -apache -asterisk -cgi -dhcpd -doc -http -ipmi -irc -java -memcached -minimal -mysql -postgres -syslog {-test}" 1,314 kB
[blocks B ] <sys-apps/openrc-0.11.8 ("<sys-apps/openrc-0.11.8" is blocking net-analyzer/munin-2.0.14)

Total: 21 packages (21 new), Size of downloads: 3,421 kB
Conflict: 1 block (1 unsatisfied)

• Error: The above package list contains packages which cannot be
• installed at the same time on the same system.

(net-analyzer/munin-2.0.14::gentoo, ebuild scheduled for merge) pulled in by
munin

(sys-apps/openrc-0.10.2-r9::gentoo, installed) pulled in by
sys-apps/openrc required by (sys-apps/baselayout-2.2.0-r4::gentoo, installed)
sys-apps/openrc required by (virtual/baselayout-0::gentoo, installed)
sys-apps/openrc required by (dev-db/mysql-init-scripts-2.0_pre1-r3::gentoo, installed)

For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked

The following USE changes are necessary to proceed:
(see "package.use" in the portage(5) man page for more details)

1. required by net-analyzer/munin-2.0.14[-minimal]
2. required by munin (argument)
   >=net-analyzer/rrdtool-1.4.8 perl

Use --autounmask-write to write changes to config files (honoring
CONFIG_PROTECT). Carefully examine the list of proposed changes,
paying special attention to mask or keyword changes that may expose
experimental or unstable packages.