I have several versions of Ubuntu installed, including 14.04 and 10.04. When I build packages using equivs-build on 14.04, it generates
.debs that contain
.xz-compressed data. The version of
dpkg on 10.04 cannot understand or install these packages, and so I see errors like this:
dpkg-deb: file `/var/cache/apt/archives/mypackage.deb' contains ununderstood data member data.tar.xz
This answer gives an approach for building Debian packages in general, but it doesn't appear equivs-build gives that level of control; unless I've missed an obvious option?