> > (a) I think I'm using the old behavior. Should I upgrade pkgsrc?
> 
> In general, yes. You should use the most uptodate version of pkgsrc
> that you can. More specifically, in this case, "yes, please upgrade
> pkgsrc."

Just upgrading fixed the problem. Thank you for your help. 

One more question: it's an emulation package. It will install Linux
libraries in ${PREFIX}/emul/linux, which turns to be
/usr/pkg/emul/linux. However, the path /emul/linux for Linux libs is
hardcoded in the kernel, so we must put the libraries there. 

Is it the user's job to do the link from /usr/pkg/emul/linux to
/emul/linux, or may I do it in the package install rule?

-- 
Emmanuel Dreyfus.  
Pas de processeur Intel, pas de logiciels Microsoft:
Des programmes sains dans un ordinateur sain.
p99dreyf@criens.u-psud.fr