Comment 6 for bug 426086

lzma utilities is not under development any more, xz-utils does everything lzma does, so fixing the error saying it would break things (when it doesn't do no harm) would be good for the 10.04 release, however 10.04 should ship with xz-utils, as it ships with GNU TAR 1.22 and that requires xz-utils to make .tar.xz files with the -J option.