• using R Under development (unstable) (2025-12-04 r89100)
• using platform: x86_64-pc-linux-gnu
• R was compiled by     gcc-15 (Debian 15.2.0-9) 15.2.0     GNU Fortran (Debian 15.2.0-9) 15.2.0
• running under: Debian GNU/Linux forky/sid
• using session charset: UTF-8
• checking for file ‘tufterhandout/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘tufterhandout’ version ‘1.2.1’
• checking CRAN incoming feasibility ... [1s/1s] NOTE Maintainer: ‘Michael C Sachs <sachsmc@gmail.com>’ No Authors@R field in DESCRIPTION. Please add one, modifying   Authors@R: person(given = c("Michael", "C"),                     family = "Sachs",                     role = c("aut", "cre"),                     email = "sachsmc@gmail.com") as necessary. Package CITATION file contains call(s) to old-style citEntry(). Please use bibentry() instead.
• checking package namespace information ... OK
• checking package dependencies ... ERROR Packages required but not available: 'rmarkdown', 'knitr' VignetteBuilder package required for checking but not installed: ‘knitr’ See section ‘The DESCRIPTION file’ in the ‘Writing R Extensions’ manual.
• DONE

Status: 1 ERROR, 1 NOTE