nfs-utils/nfs-utils-1.3.1-r5 (latest stable for amd64 in portage) blocks update to dev-libs/libevent-2.1.8 (latest stable for amd64 in portage): WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict: dev-libs/libevent:0 (dev-libs/libevent-2.1.8:0/2.1-6::gentoo, ebuild scheduled for merge) conflicts with >=dev-libs/libevent-2.0.10:0/0= required by (net-p2p/transmission-2.92-r2:0/0::gentoo, installed) ^^^^^ <=dev-libs/libevent-2.1 required by (net-fs/nfs-utils-1.3.1-r5:0/0::gentoo, installed) ^^ ^^^ Solution: either keyword later versions of nfs-utils/nfs-utils as stable, either keyword dev-libs/libevent-2.1.8 as unstable.
Can confirm this. Same here with recent portage on stable amd64 ...
Not only stable is broken here, there are several CVEs filled against libevent <2.1.8
*** This bug has been marked as a duplicate of bug 608152 ***