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

Calculating dependencies ... done!
Dependency resolution took 1.22 s (backtrack: 1/20).

[ebuild  N     ] sys-apps/config-site-0::gentoo  7 KiB
[ebuild  N     ] dev-lang/go-bootstrap-1.24.6::gentoo  USE="(-big-endian)" 71370 KiB
[ebuild  N     ] sys-devel/crossdev-20260623::gentoo  34 KiB
[ebuild  N     ] dev-embedded/arduino-ctags-20161123-r2::gentoo  479 KiB
[ebuild  N     ] dev-lang/go-1.27.2:0/1.27.2::gentoo  CPU_FLAGS_X86="sse2" 34312 KiB
[ebuild  N     ] dev-libs/libserialport-0.1.2-r1::gentoo  USE="-static-libs" 460 KiB
[ebuild  N     ] dev-libs/libusb-1.0.30:1::gentoo  USE="-debug -doc -examples -static-libs -test -udev -verify-sig" 641 KiB
[ebuild  N     ] virtual/libusb-1-r2:1::gentoo  USE="-udev" 0 KiB
[ebuild  N     ] dev-libs/hidapi-0.15.0::gentoo  USE="-doc" 356 KiB
[ebuild  N     ] dev-libs/libusb-compat-0.1.9::gentoo  USE="(split-usr) -debug -examples" 322 KiB
[ebuild  N     ] virtual/libusb-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-embedded/avrdude-8.3:0/5::gentoo  USE="python readline -ftdi -gpiod" PYTHON_SINGLE_TARGET="python3_14 -python3_12 -python3_13" 6414 KiB
[ebuild  N     ] dev-embedded/arduino-builder-1.5.4-r2::gentoo  134216 KiB

Total: 13 packages (13 new), Size of downloads: 248605 KiB