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

Calculating dependencies ... done!
Dependency resolution took 1.09 s (backtrack: 0/20).


The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by app-text/calibre-8.9.0::gentoo[python_single_target_python3_14]
# required by =app-text/calibre-8.9.0 (argument)
>=dev-python/pillow-13.0.0 webp
# required by app-text/calibre-8.9.0::gentoo[python_single_target_python3_14]
# required by =app-text/calibre-8.9.0 (argument)
>=dev-python/pyqt6-6.11.0-r1 quick svg

!!! The ebuild selected to satisfy "dev-python/pyqt6[gui,network,opengl,printsupport,quick,svg,widgets,python_targets_python3_14(-)]" has unmet requirements.
- dev-python/pyqt6-6.11.0-r1::gentoo USE="X dbus gui network opengl printsupport sql ssl widgets xml -bluetooth -debug -designer -examples -gles2-only -help -multimedia -nfc -pdfium -positioning -qml -quick -quick3d -remoteobjects -scxml -sensors -serialport -spatialaudio -speech -svg -testlib -vulkan -wayland -webchannel -websockets" PYTHON_TARGETS="python3_14 -python3_12 -python3_13 (-python3_15)"

  The following REQUIRED_USE flag constraints are unsatisfied:
    quick? ( qml )

  The above constraints are a subset of the following complete expression:
    designer? ( gui widgets ) help? ( gui widgets ) multimedia? ( gui network ) opengl? ( gui ) pdfium? ( gui ) printsupport? ( gui widgets ) qml? ( network ) quick3d? ( gui qml ) quick? ( gui qml ) remoteobjects? ( network ) scxml? ( gui ) spatialaudio? ( multimedia ) sql? ( widgets ) svg? ( gui ) testlib? ( gui widgets ) vulkan? ( gui ) webchannel? ( network ) websockets? ( network ) widgets? ( gui ) any-of ( python_targets_python3_12 python_targets_python3_13 python_targets_python3_14 python_targets_python3_15 )

(dependency required by "app-text/calibre-8.9.0::gentoo[python_single_target_python3_14]" [ebuild])
(dependency required by "=app-text/calibre-8.9.0" [argument])