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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] sys-fs/squashfs-tools-ng-1.3.2::gentoo  USE="lzma tools -lz4 -lzo (-selinux) -zstd" 572 KiB

Total: 1 package (1 new), Size of downloads: 572 KiB