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

Calculating dependencies ... done!
Dependency resolution took 2.21 s (backtrack: 3/20).

[ebuild     U  ] dev-python/installer-1.1.0::gentoo [0.7.0::gentoo] USE="-test -verify-provenance%" PYTHON_TARGETS="python3_14* -pypy3_12% -python3_12 -python3_13* -python3_14t (-python3_15) (-python3_15t) (-pypy3_11%) (-python3_11%) (-python3_13t%)" 924 KiB
[ebuild     U  ] dev-python/gpep517-20::gentoo [19::gentoo] USE="-test" PYTHON_TARGETS="python3_14* -python3_12 -python3_13* -python3_14t (-python3_15) (-python3_15t) (-pypy3_11%) (-python3_11%) (-python3_13t%)" 29 KiB
[ebuild  NS    ] dev-lang/rust-bin-1.99.0:1.99.0::gentoo [1.94.0:1.94.0::gentoo] USE="clippy rustfmt (-big-endian) -doc* (-prefix) -rust-analyzer -rust-src -verify-sig" CPU_FLAGS_X86="sse2" LLVM_SLOT="(23%*) (-21%*)" 205530 KiB
[ebuild  N     ] dev-python/uv-0.13.1::gentoo  USE="-debug -test" 51868 KiB
[ebuild  N     ] dev-python/uv-build-0.13.1::gentoo  USE="-test" PYTHON_TARGETS="python3_14 -python3_12 -python3_13 (-python3_15)" 437 KiB
[ebuild  N     ] dev-python/narwhals-2.26.0::gentoo  USE="-test -verify-provenance" PYTHON_TARGETS="python3_14 -python3_12 -python3_13" 671 KiB

Total: 6 packages (2 upgrades, 3 new, 1 in new slot), Size of downloads: 259457 KiB

WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:

dev-python/packaging:0

  (dev-python/packaging-26.3:0/0::gentoo, ebuild scheduled for merge) USE="-test -verify-provenance" PYTHON_TARGETS="python3_14 -pypy3_12 -python3_12 -python3_13 -python3_14t (-python3_15) (-python3_15t)" conflicts with
    >=dev-python/packaging-25.0[python_targets_python3_13(-)] required by (dev-python/setuptools-81.0.0:0/0::gentoo, installed) USE="-test" PYTHON_TARGETS="python3_13 -pypy3_11 -python3_11 -python3_12 -python3_13t -python3_14 -python3_14t"
                                                             
    >=dev-python/packaging-23.2[python_targets_python3_13(-)] required by (dev-python/pyproject-metadata-0.11.0:0/0::gentoo, installed) USE="-test -verify-provenance" PYTHON_TARGETS="python3_13 -pypy3_11 -python3_11 -python3_12 -python3_13t -python3_14 -python3_14t"
                                                             
    >=dev-python/packaging-23.2[python_targets_python3_13(-)] required by (dev-python/scikit-build-core-0.12.2:0/0::gentoo, installed) USE="-test -verify-provenance" PYTHON_TARGETS="python3_13 -pypy3_11 -python3_11 -python3_12 -python3_14"
                                                             
    >=dev-python/packaging-26.0[python_targets_python3_13(-)] required by (dev-python/wheel-0.46.3:0/0::gentoo, installed) USE="-test -verify-provenance" PYTHON_TARGETS="python3_13 -pypy3_11 -python3_11 -python3_12 -python3_13t -python3_14 -python3_14t"
                                                             
    >=dev-python/packaging-24.2[python_targets_python3_13(-)] required by (dev-python/hatchling-1.29.0:0/0::gentoo, installed) USE="-test" PYTHON_TARGETS="python3_13 -pypy3_11 -python3_11 -python3_12 -python3_13t -python3_14 -python3_14t"
                                                             
    dev-python/packaging[python_targets_python3_13(-)] required by (dev-python/setuptools-scm-9.2.2:0/0::gentoo, installed) USE="-test -verify-provenance" PYTHON_TARGETS="python3_13 -pypy3_11 -python3_11 -python3_12 -python3_13t -python3_14 -python3_14t"
                                                      


!!! The following update(s) have been skipped due to unsatisfied dependencies
!!! triggered by backtracking:

dev-python/gpep517:0