+ i3-migrate-config-to-v4 and i3-dmenu-desktop are implemented in Perl, but have
+ no dependencies besides Perl 5.10.
+
+ i3-save-tree is also implemented in Perl and needs AnyEvent::I3 and JSON::XS.
+ While i3-save-tree is not required for running i3 itself, it is strongly
+ recommended to provide it in distribution packages.