emerge -av1 app-emulation/libvirt

Local copy of remote index is up-to-date and will be used.

Local copy of remote index is up-to-date and will be used.

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

Calculating dependencies... done!
[binary  N     ] acct-group/radvd-0::gentoo  14 KiB
[binary  N     ] app-misc/scrub-2.6.1::gentoo  42 KiB
[binary  N     ] acct-group/libvirt-0-r1::gentoo  14 KiB
[binary  N     ] dev-libs/yajl-2.1.0-r3:0/2::gentoo  ABI_X86="(64) -32 (-x32)" 65 KiB
[binary  N     ] net-misc/ethertypes-0::gentoo  12 KiB
[binary  N     ] acct-group/qemu-0-r1::gentoo  14 KiB
[binary  N     ] acct-user/qemu-0-r1::gentoo  0 KiB
[binary  N     ] net-libs/libssh2-1.10.0::gentoo  USE="zlib -gcrypt -mbedtls" ABI_X86="(64) -32 (-x32)" 308 KiB
[binary  N     ] net-libs/rpcsvc-proto-1.4.2::gentoo  83 KiB
[binary  N     ] net-firewall/ebtables-2.0.11-r3::gentoo  USE="perl -static" 102 KiB
[binary  N     ] acct-user/radvd-0::gentoo  0 KiB
[binary  N     ] net-misc/radvd-2.19-r2::gentoo  USE="(-selinux) -test" 95 KiB
[binary  N     ] net-analyzer/openbsd-netcat-1.195::gentoo  56 KiB
[binary  N     ] app-emulation/libvirt-7.7.0-r1:0/7.7.0::gentoo  USE="caps libvirtd nfs nls policykit qemu sasl udev virt-network -apparmor -audit -bash-completion -dtrace -firewalld -fuse -glusterfs -iscsi -iscsi-direct -libssh -lvm -lxc -numa (-openvz) -parted -pcap -rbd (-selinux) -verify-sig -virtualbox -wireshark-plugins -xen -zfs" 7569 KiB
[blocks B      ] net-analyzer/netcat ("net-analyzer/netcat" is soft blocking net-analyzer/openbsd-netcat-1.195)

Total: 14 packages (14 new, 14 binaries), Size of downloads: 8368 KiB
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/netcat-110.20180111-r1:0/0::gentoo, installed) pulled in by
    net-analyzer/netcat required by @selected 

  (net-analyzer/openbsd-netcat-1.195:0/0::gentoo, binary scheduled for merge) pulled in by
    >=net-analyzer/openbsd-netcat-1.105-r1 required by (app-emulation/libvirt-7.7.0-r1:0/7.7.0::gentoo, binary scheduled for merge) USE="caps libvirtd nfs nls policykit qemu sasl udev virt-network -apparmor -audit -bash-completion -dtrace -firewalld -fuse -glusterfs -iscsi -iscsi-direct -libssh -lvm -lxc -numa (-openvz) -parted -pcap -rbd (-selinux) -verify-sig -virtualbox -wireshark-plugins -xen -zfs" ABI_X86="(64)"


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

https://wiki.gentoo.org/wiki/Handbook:X86/Working/Portage#Blocked_packages