[R-sig-Debian] installation problem for R 4.0 on Debian buster

[Dirk Eddelbuettel]

On 5 June 2020 at 08:52, Johannes Ranke wrote:
| Hi Mark,
| 
| Am Freitag, 5. Juni 2020, 00:31:34 CEST schrieb Mark van der Loo:
| > Hi all,
| > 
| > I just spun up a fresh Debian Buster instance, then I added:
| > 
| > deb http://cloud.r-project.org/bin/linux/debian buster-cran40/
| > 
| > to /etc/apt/sources.list. I also ran the apt-key command as described here:
| > https://cran.r-project.org/bin/linux/debian/#secure-apt
| > 
| > So far so good, 
| 
| OK, then you need to keep reading. Instead of simply installing R 4.0.0 you 
| need to remove the packages depending on r-api-35 as detailed in
| 
| https://cran.r-project.org/bin/linux/debian/#debian-bullseye-testing
| 
| The reason is that the backported r-cran-* packages have a lower version 
| number than the r-cran-* packages in the Debian archive, but the packages in 
| the Debian archive depend on r-api-35 while the new backport provides r-
| api-40.

That sounds ... suboptimal. And I am not sure I understand why that would be.
Can you explain?  Are they behind a version?  If so, why?

Also, apt-pinning can help here.  You can give a repo a higher-than-default
priority. Maybe that would be applicable here?

Dirk
 
| Also, you will need to rebuild all locally installed packages as detailed on 
| the CRAN Debian page.
| 
| Greetings,
| 
| Johannes 
| 
| > now when I do the following, I get no joy:
| > 
| > $ sudo apt-get install r-base
| > 
| > Reading package lists... Done
| > Building dependency tree
| > Reading state information... Done
| > Some packages could not be installed. This may mean that you have
| > requested an impossible situation or if you are using the unstable
| > distribution that some required packages have not yet been created
| > or been moved out of Incoming.
| > The following information may help to resolve the situation:
| > 
| > The following packages have unmet dependencies:
| >  r-base : Depends: r-recommended (= 4.0.0-1~bustercran.0) but it is not
| > going to be installed
| > E: Unable to correct problems, you have held broken packages.
| > 
| > 
| > However, when I use the buster-cran-35 deb line, all works fine. So there
| > seems to be something going on with buster-cran-40. Is this correct, or am
| > I missing something?
| > 
| > Thanks,
| > Mark
| > 
| > 	[[alternative HTML version deleted]]
| > 
| > _______________________________________________
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| 
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