Glad to see that did not chose the "depend way". However, i have a
remark about the hplip.conf file. Before this bug was opened, I
tried to dig myself into the hplip related packages and yes the
hplip.conf was shipped (up to now) with the hplip package. It seems
that it is still updated after installation through the hplip postinst
script (to fix PPD file paths). Could it be harmful (for instance a
user that first installs libsane-hpaio then later decides to install
hplip)? Well, I raise the question just in case (I guess there is no
problem because there is no reason to modify the file with only
libsane-hpaio installed), and I am quite sure that you have regarded
this already.