[blocks B ] <sys-fs/device-mapper-1.02.19-r1 (is blocking sys-fs/udev-116-r1)
[blocks B ] <dev-libs/boost-1.34.0 (is blocking dev-util/boost-build-1.34.1)
[blocks B ] <net-print/foomatic-filters-ppds-20070501 (is blocking net-print/cups-1.2.12-r1)
[ebuild U ] sys-fs/device-mapper-1.02.22-r5 [1.02.10-r1]
[ebuild U ] sys-fs/udev-116-r1 [104-r8]
[blocks B ] <sys-fs/device-mapper-1.02.19-r1 (is blocking sys-fs/udev-116-r1)
localhost jill # emerge -u device-mapper
Calculating dependencies... done!
!!! Error: the <sys-fs/device-mapper-1.02.19-r1 package conflicts with another package;
!!! the two packages cannot be installed on the same system together.
!!! Please use 'emerge --pretend' to determine blockers.