This is currently no problem as
this is pulled in by the lesstif2-dev package that you do depend on.
Lesstif2 was originally created as an
free alternative for motif, but in the mean time became unmaintained and
To ease the transition that will happen some time soon, we will follow
> hotswap - libxtdev, libxext-dev, libxp-dev
> xtel - libxpd-dev