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

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

[ebuild  N     ] media-libs/alsa-topology-conf-1.2.5.1-r1::gentoo  USE="-verify-sig" 12 KiB
[ebuild  N     ] media-libs/alsa-ucm-conf-1.2.16.1::gentoo  USE="-verify-sig" 83 KiB
[ebuild   R    ] sys-libs/zlib-1.3.2-r1:0/1::gentoo  USE="minizip* -static-libs -verify-sig" 1290 KiB
[ebuild  N     ] virtual/minizip-1.3.1:0/1::gentoo  USE="-static-libs" 0 KiB
[ebuild  N     ] dev-util/vulkan-headers-1.4.363.0::gentoo  USE="-test" 3337 KiB
[ebuild  N     ] media-libs/alsa-lib-1.2.16.1::gentoo  USE="python -debug -doc -verify-sig" PYTHON_SINGLE_TARGET="python3_14 -python3_12 -python3_13 (-python3_15)" 1104 KiB
[ebuild  N     ] x11-libs/libXcursor-1.2.3::gentoo  USE="-doc" 286 KiB
[ebuild  N     ] media-libs/vulkan-loader-1.4.363.0::gentoo  USE="X -wayland" 1823 KiB
[ebuild  N     ] media-libs/libsdl2-2.32.10::gentoo  USE="X alsa dbus haptic joystick opengl sound video (-aqua) (-custom-cflags) -doc -fcitx -gles1 -gles2 -ibus -jack -kms -libsamplerate -nas -oss -pipewire -pulseaudio -sndio -static-libs -test -udev -vulkan -wayland -xscreensaver" CPU_FLAGS_X86="mmx sse sse2 sse3 -3dnow" 7452 KiB
[ebuild  N     ] games-emulation/mupen64plus-core-2.6.0:0/2-sdl2::gentoo  USE="osd vulkan -debugger -gles2-only -lirc -netplay -new-dynarec -opencv" CPU_FLAGS_X86="sse" 1714 KiB
[ebuild  N     ] games-emulation/mupen64plus-input-sdl-2.6.0::gentoo  61 KiB

Total: 11 packages (10 new, 1 reinstall), Size of downloads: 17157 KiB

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by virtual/minizip-1.3.1::gentoo[-static-libs]
# required by games-emulation/mupen64plus-core-2.6.0::gentoo
# required by games-emulation/mupen64plus-input-sdl-2.6.0::gentoo
# required by =games-emulation/mupen64plus-input-sdl-2.6.0 (argument)
>=sys-libs/zlib-1.3.2-r1 minizip