Tune mksquashfs for smaller isos.

Bigger block size, more suitable for xz.

Changed files
+1 -1
nixos
+1 -1
nixos/lib/make-squashfs.nix
···
# Generate the squashfs image.
mksquashfs nix-path-registration $storePaths $out \
-
-keep-as-directory -all-root -comp xz
+
-keep-as-directory -all-root -b 1048576 -comp xz -Xdict-size 100%
'';
}