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

Calculating dependencies ... done!
Dependency resolution took 1.54 s (backtrack: 0/20).

[ebuild     U  ] x11-libs/libdrm-2.4.134::gentoo [2.4.131::gentoo] USE="-doc -test -tools -udev -valgrind" VIDEO_CARDS="vmware -amdgpu (-exynos) (-freedreno) -intel -nouveau (-omap) -radeon (-tegra) (-vc4) (-vivante)" 427 KiB

Total: 1 package (1 upgrade), Size of downloads: 427 KiB