<<< packages_pkgcheck_scan >>>
    NonexistentBlocker: version 4.6.2: nonexistent blocker RDEPEND="!<net-dns/pdns-2.9.20-r1": no matches in repo history
    NonexistentBlocker: version 4.7.0: nonexistent blocker RDEPEND="!<net-dns/pdns-2.9.20-r1": no matches in repo history
    NonexistentBlocker: version 4.7.1: nonexistent blocker RDEPEND="!<net-dns/pdns-2.9.20-r1": no matches in repo history
<<< open bugs >>>
  https://bugs.gentoo.org/485198 net-dns/pdns-recursor_-_Improved_chroot_support