Building squid 3.5.26 on Debian jessie, compilation error?

Question

Debian

I'm trying to build, as you can see, all packages are being built, except for purge, Actually, what would someone do? I'm afraid if you score, then you can forget, then when you reinstall the squid, remove all the garbage or am I mistaken and this package is required?
What should I do now? What would you do?
dpkg-gencontrol: warning: package squid: unused substitution variable ${perl:Depends}
dh_md5sums -psquid
dh_builddeb -psquid
dpkg-deb: building package `squid' in `../squid_3.5.26-1_amd64.deb'.
dh_gencontrol -psquid-dbg
dh_md5sums -psquid-dbg
dh_builddeb -psquid-dbg
dpkg-deb: building package `squid-dbg' in `../squid-dbg_3.5.26-1_amd64.deb'.
dh_gencontrol -psquidclient
dh_md5sums -psquidclient
dh_builddeb -psquidclient
dpkg-deb: building package `squidclient' in `../squidclient_3.5.26-1_amd64.deb'.
dh_gencontrol -psquid-cgi
dh_md5sums -psquid-cgi
dh_builddeb -psquid-cgi
dpkg-deb: building package `squid-cgi' in `../squid-cgi_3.5.26-1_amd64.deb'.
dh_gencontrol -psquid-purge
dh_md5sums -psquid-purge
dh_builddeb -psquid-purge
dpkg-deb: building package `squid-purge' in `../squid-purge_3.5.26-1_amd64.deb'.
dpkg-genchanges >../squid3_3.5.26-1_amd64.changes
dpkg-genchanges: error: cannot read ../squid3_3.5.26-1.dsc: No such file or directory
dpkg-buildpackage: error: dpkg-genchanges gave error exit status 2
debuild: fatal error at line 1376:
dpkg-buildpackage -rfakeroot -D -us -uc -nc failed

Answer 1

dpkg-genchanges: error: cannot read ../squid3_3.5.26-1.dsc: No such file or directory

Answer 2

this uupdate pissed me off like that? And how can I do it now? dsc is from the old version, shouldn't a new one have been formed during the update?