Hi Efraim, > > +             (chdir "test") > > +             (invoke "./runtests.sh") > > +             (chdir "..") > > > for this part you may want to look into 'with-directory-excursion' Thanks.  Will do. In fact, in these patches there is a need to change directories a few times, so I will unify the treatment throughout with 'with-directory- excursion'. Best regards, Paul.