emerge -pv dev-util/vulkan-tools

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

Calculating dependencies... done!
Dependency resolution took 2.87 s (backtrack: 0/20).

[ebuild     U  ] dev-util/vulkan-headers-1.3.283.0::gentoo [1.3.275::gentoo] 0 KiB
[ebuild     U  ] media-libs/vulkan-loader-1.3.283.0::gentoo [1.3.275::gentoo] USE="X -layers -wayland" ABI_X86="32 (64) (-x32)" 0 KiB
[ebuild     U  ] dev-util/volk-1.3.283.0::gentoo [1.3.275::gentoo] USE="-test" ABI_X86="(64) -32 (-x32)" 0 KiB
[ebuild     U  ] dev-util/vulkan-tools-1.3.283.0::gentoo [1.3.268::gentoo] USE="X -cube -wayland" ABI_X86="(64) -32 (-x32)" 0 KiB

Total: 4 packages (4 upgrades), Size of downloads: 0 KiB

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

emerge -pvc vulkan-loader

Calculating dependencies... done!
  media-libs/vulkan-loader-1.3.275 pulled in by:
    dev-util/volk-1.3.275 requires ~media-libs/vulkan-loader-1.3.275:0/0=[abi_x86_64(-)]
    media-libs/libsdl2-2.28.1 requires media-libs/vulkan-loader
    media-video/ffmpeg-4.4.4-r3 requires >=media-libs/vulkan-loader-1.1.97:0/0=[abi_x86_64(-)]

>>> No packages selected for removal by depclean
Packages installed:   1057
Packages in world:    101
Packages in system:   49
Required packages:    1057
Number to remove:     0