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

Calculating dependencies ... done!
Dependency resolution took 1.69 s (backtrack: 0/20).

[ebuild     U  ] dev-python/installer-1.1.0::gentoo [0.7.0::gentoo] USE="-test -verify-provenance%" PYTHON_TARGETS="python3_13 python3_14* -pypy3_12% -python3_12 -python3_14t (-python3_15) (-python3_15t) (-pypy3_11%) (-python3_11%) (-python3_13t%)" 924 KiB
[ebuild  N     ] dev-lang/orc-0.4.42::gentoo  USE="-static-libs -test" 275 KiB
[ebuild  N     ] media-libs/opus-1.6.1::gentoo  USE="-custom-modes -debug -deep-plc -doc -dred -hardened -osce -static-libs -test" CPU_FLAGS_X86="sse" 10228 KiB
[ebuild  N     ] app-emulation/spice-protocol-0.14.5::gentoo  24 KiB
[ebuild     U  ] dev-python/gpep517-23::gentoo [19::gentoo] USE="-test" PYTHON_TARGETS="python3_13 python3_14* -pypy3_12% -python3_12 -python3_14t (-python3_15) (-python3_15t) (-pypy3_11%) (-python3_11%) (-python3_13t%)" 31 KiB
[ebuild     U  ] dev-python/flit-core-4.1.0::gentoo [3.12.0::gentoo] USE="-test -verify-provenance%" PYTHON_TARGETS="python3_13 python3_14* -pypy3_12% -python3_12 -python3_14t (-python3_15) (-python3_15t) (-pypy3_11%) (-python3_11%) (-python3_13t%)" 54 KiB
[ebuild     U  ] dev-python/packaging-26.3::gentoo [26.0::gentoo] USE="-test -verify-provenance" PYTHON_TARGETS="python3_13 python3_14* -pypy3_12% -python3_12 -python3_14t (-python3_15) (-python3_15t) (-pypy3_11%) (-python3_11%) (-python3_13t%)" 307 KiB
[ebuild  N     ] dev-python/pyparsing-3.3.3::gentoo  USE="-examples -test" PYTHON_TARGETS="python3_13 python3_14 -python3_12 (-python3_15)" 1026 KiB
[ebuild  N     ] app-emulation/spice-0.15.2::gentoo  USE="-gstreamer -lz4 -sasl -smartcard -static-libs -test" 1625 KiB

Total: 9 packages (4 upgrades, 5 new), Size of downloads: 14489 KiB

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by app-emulation/spice-0.15.2::gentoo
# required by =app-emulation/spice-0.15.2 (argument)
>=dev-python/pyparsing-3.3.3 python_targets_python3_13
# required by dev-python/pyparsing-3.3.3::gentoo
# required by app-emulation/spice-0.15.2::gentoo
# required by =app-emulation/spice-0.15.2 (argument)
>=dev-python/gpep517-23 python_targets_python3_13
# required by dev-python/pyparsing-3.3.3::gentoo
# required by app-emulation/spice-0.15.2::gentoo
# required by =app-emulation/spice-0.15.2 (argument)
>=dev-python/flit-core-4.1.0 python_targets_python3_13
# required by dev-python/gpep517-23::gentoo
# required by dev-python/packaging-26.3::gentoo
# required by dev-python/setuptools-81.0.0::gentoo
# required by dev-python/markupsafe-3.0.3::gentoo
# required by dev-python/jinja2-3.1.6::gentoo
# required by sys-auth/pambase-20251104-r1::gentoo
# required by net-misc/openssh-10.2_p1-r1::gentoo[pam]
# required by virtual/openssh-0-r1::gentoo
# required by virtual/ssh-0-r2::gentoo[-minimal]
# required by @system
# required by @world (argument)
>=dev-python/installer-1.1.0 python_targets_python3_13
# required by dev-python/gpep517-23::gentoo
# required by dev-python/flit-core-4.1.0::gentoo
# required by dev-python/pyparsing-3.3.3::gentoo
# required by app-emulation/spice-0.15.2::gentoo
# required by =app-emulation/spice-0.15.2 (argument)
>=dev-python/packaging-26.3 python_targets_python3_13