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

Calculating dependencies  ... done!
Dependency resolution took 12.45 s (backtrack: 0/20).

[ebuild   R    ] dev-qt/qtcore-5.15.11-r1:5/5.15.11::gentoo  USE="icu -debug -old-kernel -test" 0 KiB
[ebuild   R    ] dev-qt/qtnetwork-5.15.11:5/5.15::gentoo  USE="ssl -debug -gssapi -libproxy -sctp -test" 0 KiB
[ebuild   R    ] dev-qt/qtdbus-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtxml-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtconcurrent-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtsql-5.15.11-r1:5/5.15.11::gentoo  USE="sqlite -debug -freetds -mysql -oci8 -odbc -postgres -test" 0 KiB
[ebuild   R    ] dev-qt/qttest-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtlockedfile-2.4.1_p20171024::gentoo  USE="-doc" 0 KiB
[ebuild   R    ] dev-qt/qtserialport-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtxmlpatterns-5.15.11:5::gentoo  USE="-debug -qml -test" 0 KiB
[ebuild   R    ] dev-qt/qtbluetooth-5.15.11:5/5.15::gentoo  USE="-debug -qml -test" 0 KiB
[ebuild   R    ] dev-qt/qtgui-5.15.11-r2:5/5.15.11::gentoo  USE="X accessibility dbus egl eglfs jpeg libinput png udev vulkan -debug -evdev -gles2-only -ibus -linuxfb -test -tslib -tuio -vnc -wayland" 0 KiB
[ebuild   R    ] dev-qt/qtx11extras-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtwidgets-5.15.11-r1:5/5.15::gentoo  USE="X dbus gtk png -debug -gles2-only -test" 0 KiB
[ebuild   R    ] dev-qt/qtsvg-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtdeclarative-5.15.11-r2:5/5.15::gentoo  USE="jit vulkan widgets -debug -gles2-only -localstorage -test" 0 KiB
[ebuild   R    ] dev-qt/qtprintsupport-5.15.11:5/5.15::gentoo  USE="cups -debug -gles2-only -test" 0 KiB
[ebuild   R    ] dev-qt/qtopengl-5.15.11:5/5.15::gentoo  USE="-debug -gles2-only -test" 0 KiB
[ebuild   R    ] dev-qt/qthelp-5.15.11:5/5.15::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtimageformats-5.15.11:5::gentoo  USE="mng -debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtsingleapplication-2.6.1_p20171024::gentoo  USE="X -doc" 0 KiB
[ebuild   R    ] dev-qt/linguist-tools-5.15.11:5::gentoo  USE="qml -debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtwebchannel-5.15.11:5/5.15::gentoo  USE="qml -debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtgraphicaleffects-5.15.11:5::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/designer-5.15.11:5/5.15::gentoo  USE="-debug -declarative -test" 0 KiB
[ebuild   R    ] dev-qt/qtcharts-5.15.11:5/5.15::gentoo  USE="qml -debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtpositioning-5.15.11:5/5.15::gentoo  USE="qml -debug -geoclue -test" 0 KiB
[ebuild   R    ] dev-qt/qtquickcontrols2-5.15.11:5/5.15::gentoo  USE="widgets -debug -test" 0 KiB
[ebuild   R    ] dev-qt/qttranslations-5.15.11:5::gentoo  USE="-debug -test" 0 KiB
[ebuild   R    ] dev-qt/qtbase-6.6.1-r1:6/6.6.1::gentoo  USE="X concurrent cups dbus gtk gui icu libinput network nls opengl sql sqlite ssl udev vulkan widgets xml -accessibility -brotli -eglfs -evdev -gles2-only -gssapi -libproxy -mysql -oci8 -odbc -postgres -sctp -test -tslib -wayland -zstd" 0 KiB
[ebuild   R    ] dev-qt/qtshadertools-6.6.1:6/6.6.1::gentoo  USE="-test" 0 KiB
[ebuild   R    ] dev-qt/qt5compat-6.6.1:6/6.6.1::gentoo  USE="icu -qml -test" 0 KiB
[ebuild   R    ] dev-qt/qtimageformats-6.6.1:6/6.6.1::gentoo  USE="mng -test" 0 KiB
[ebuild   R    ] dev-qt/qtserialport-6.6.1:6/6.6.1::gentoo  USE="-test" 0 KiB
[ebuild   R    ] dev-qt/qtsvg-6.6.1:6/6.6.1::gentoo  USE="-test" 0 KiB
[ebuild   R    ] dev-qt/qtconnectivity-6.6.1:6/6.6.1::gentoo  USE="bluetooth -nfc -smartcard -test" 0 KiB
[ebuild   R    ] dev-qt/qtdeclarative-6.6.1:6/6.6.1::gentoo  USE="opengl sql vulkan widgets -test" 0 KiB
[ebuild   R    ] dev-qt/qttools-6.6.1:6/6.6.1::gentoo  USE="assistant designer linguist opengl qml vulkan widgets -clang -distancefieldgenerator -gles2-only -pixeltool -qdbus -qdoc -qtattributionsscanner -qtdiag -qtplugininfo -test -zstd" 0 KiB
[ebuild   R    ] dev-qt/qtquicktimeline-6.6.1:6/6.6.1::gentoo  USE="-test" 0 KiB
[ebuild   R    ] dev-qt/qtwebchannel-6.6.1:6/6.6.1::gentoo  USE="qml -test" 0 KiB
[ebuild   R    ] dev-qt/qtquick3d-6.6.1:6/6.6.1::gentoo  USE="opengl vulkan -test" 0 KiB
[ebuild   R    ] dev-qt/qttranslations-6.6.1:6/6.6.1::gentoo  0 KiB
[ebuild   R    ] dev-qt/qtmultimedia-5.15.11:5/5.15::gentoo  USE="alsa gstreamer pulseaudio qml widgets -debug -gles2-only -openal -test" 0 KiB
[ebuild     U  ] dev-qt/qtwebengine-6.6.1:6/6.6.1::gentoo [6.5.3:6/6.5.3::gentoo] USE="alsa jumbo-build opengl pulseaudio system-icu vulkan widgets -bindist -custom-cflags -designer -geolocation -kerberos -pdfium -qml -screencast -test -vaapi%" 411 184 KiB
[ebuild   R    ] dev-qt/qtwebengine-5.15.11_p20231120:5/5.15::gentoo  USE="alsa jumbo-build pulseaudio system-icu widgets -bindist -debug -designer -geolocation -kerberos -screencast -test" 0 KiB
[ebuild   R   ~] dev-qt/qt-creator-12.0.1::gentoo  USE="clang designer help serialterminal svg tracing webengine -doc -qmldesigner -test" 0 KiB
[ebuild   R    ] dev-qt/qtmultimedia-6.6.1-r1:6/6.6.1::gentoo  USE="X alsa ffmpeg gstreamer opengl pulseaudio qml vulkan -test -v4l -vaapi" 0 KiB

Total: 47 packages (1 upgrade, 46 reinstalls), Size of downloads: 411 184 KiB