List of failed R packages builds on Hydra with rank of packages added (thanks to {packageRank}). PRs fixing packages are also linked.
Bioconductor packages are also listed.
https://raw.githack.com/b-rodrigues/nixpkgs-r-updates-fails/targets-runs/output/r-updates-fails.html
The action generating the website runs each day at midnight. Do check the original on Hydra, because Bioconductor packages are not listed, nor packages for which somehow {packageRank} can't find a ranking.
Contributions more than welcome!