To cite package ‘pkgconfig’ in publications use:

Csárdi G (2023). pkgconfig: Private Configuration for 'R' Packages. R package version 2.0.3, https://github.com/r-lib/pkgconfig.

Corresponding BibTeX entry:

  @Manual{,
    title = {pkgconfig: Private Configuration for 'R' Packages},
    author = {Gábor Csárdi},
    year = {2023},
    note = {R package version 2.0.3},
    url = {https://github.com/r-lib/pkgconfig},
  }