root@MediaNas:~# cat /etc/apt/preferences.d/99omv-extras-org
Package: *
Pin: release n=erasmus-backports, origin dl.bintray.com
Pin-Priority: 995
Package: virtualbox virtualbox-dkms virtualbox-qt minidlna borgbackup python3-msgpack
certbot python-acme python-certbot python-cffi python-cffi-backend python-chardet
python-configargparse python-configobj python-cryptography python-dialog python-enum34
python-funcsigs python-idna python-ipaddress python-mock python-ndg-httpsclient
python-openssl python-parsedatetime python-pbr python-pkg-resources python-psutil
python-pyasn1 python-requests python-rfc3339 python-setuptools python-six python-tz
python-urllib3 python-zope.component python-zope.event python-zope.interface
Pin: release a=jessie-backports
Pin-Priority: 500
Package: *
Pin: release n=erasmus, origin dl.bintray.com
Pin-Priority: 995
Package: *
Pin: release n=erasmus-testing, origin dl.bintray.com
Pin-Priority: 996