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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] sys-fs/squashfs-tools-4.7.5::gentoo  USE="xattr -debug -lz4 -lzma -lzo -zstd" 403 KiB

Total: 1 package (1 new), Size of downloads: 403 KiB