On 20/11/15 15:07, Kynn Jones wrote:
Also, I set the contents of my `/etc/apt/preferences` file to this (the file was empty before):Package: * Pin: release a=stable
Looking at the Debian wiki's page on APT preferences[1] and comparing to your file, I notice that you haven't specified a Pin-Priority for this pin.
P.S. FWIW, ultimately, what I want to perform a very controlled, tightly-targeted upgrade of my R-related packages (i.e. `r-base` and friends) to `stretch`/`testing`. IOW, I want to keep the non-`jessie` packages installed in my system to the absolute minimum that is compatible with upgrading R to `stretch`/`testing`.
Just so you know, this is a discouraged[2] (and completely unsupported) configuration.
[1] https://wiki.debian.org/AptPreferences [2] https://wiki.debian.org/DontBreakDebian#Don.27t_make_a_FrankenDebian
