To cite package ‘sys’ in publications use:

  Ooms J (2024). _sys: Powerful and Reliable Tools for Running System
  Commands in R_. R package version 3.4.3,
  <https://github.com/jeroen/sys>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {sys: Powerful and Reliable Tools for Running System Commands in R},
    author = {Jeroen Ooms},
    year = {2024},
    note = {R package version 3.4.3},
    url = {https://github.com/jeroen/sys},
  }