emerge -pv net-im/psi

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

Calculating dependencies... done!
[ebuild   R    ] dev-qt/qtcore-4.8.6-r1:4  USE="exceptions glib iconv icu qt3support* ssl (-aqua) -debug -pch" ABI_X86="(64) -32 (-x32)" 235,961 kB
[ebuild   R    ] dev-qt/qtgui-4.8.6-r1:4  USE="accessibility exceptions glib mng qt3support* tiff xinerama xv (-aqua) -cups -debug -egl -gtkstyle -nas -nis -pch -trace" ABI_X86="(64) -32 (-x32)" 51 kB
[ebuild   R    ] dev-qt/qtsql-4.8.6-r1:4  USE="exceptions qt3support* sqlite (-aqua) -debug -freetds -mysql -oci8 -odbc -pch -postgres" ABI_X86="(64) -32 (-x32)" 0 kB
[ebuild  N     ] dev-qt/qt3support-4.8.6-r1:4  USE="accessibility exceptions (-aqua) -debug -pch" ABI_X86="(64) -32 (-x32)" 0 kB
[ebuild  N     ] sys-devel/qconf-1.5_pre717-r1  42 kB
[ebuild  N     ] app-crypt/qca-gnupg-2.0.0_beta3:2  USE="-debug" 38 kB
[ebuild  N     ] net-im/psi-0.15  USE="crypt dbus ssl -debug -doc -jingle -spell -whiteboarding -xscreensaver" LINGUAS="fr pl -be -cs -de -it -ja -pt_BR -ru -sl -sv -ur_PK -zh_TW" 2,454 kB
[blocks B      ] app-crypt/qca-gnupg ("app-crypt/qca-gnupg" is blocking app-crypt/qca-2.1.0.3)

Total: 7 packages (4 new, 3 reinstalls), Size of downloads: 238,544 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.

  (app-crypt/qca-gnupg-2.0.0_beta3::gentoo, ebuild scheduled for merge) pulled in by
    app-crypt/qca-gnupg:2 required by (net-im/psi-0.15::gentoo, ebuild scheduled for merge)

  (app-crypt/qca-2.1.0.3::gentoo, installed) pulled in by
    >=app-crypt/qca-2.0.2:2[qt4(+)] required by (net-im/psi-0.15::gentoo, ebuild scheduled for merge)
    app-crypt/qca:2[qt4(+)] required by (net-irc/quassel-0.11.0::gentoo, installed)
    app-crypt/qca:2[openssl] required by (net-irc/quassel-0.11.0::gentoo, installed)
    app-crypt/qca:2[openssl] required by (net-im/psi-0.15::gentoo, ebuild scheduled for merge)
    >=app-crypt/qca-2.0[debug?] (>=app-crypt/qca-2.0) required by (app-crypt/qca-gnupg-2.0.0_beta3::gentoo, ebuild scheduled for merge)


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)
# required by dev-qt/qt3support-4.8.6-r1
# required by dev-qt/qtgui-4.8.6-r1[qt3support]
# required by net-im/psi-0.15
# required by net-im/psi (argument)
>=dev-qt/qtsql-4.8.6-r1:4 qt3support
# required by dev-qt/qt3support-4.8.6-r1
# required by dev-qt/qtgui-4.8.6-r1[qt3support]
# required by net-im/psi-0.15
# required by net-im/psi (argument)
>=dev-qt/qtcore-4.8.6-r1:4 qt3support
# required by dev-qt/qtcore-4.8.6-r1[qt3support]
# required by dev-qt/qtsql-4.8.6-r1
# required by dev-qt/qt3support-4.8.6-r1
# required by net-im/psi-0.15
# required by net-im/psi (argument)
>=dev-qt/qtgui-4.8.6-r1:4 qt3support