To cite package ‘dir.expiry’ in publications use:

  Lun A (2022). _dir.expiry: Managing Expiration for Cache
  Directories_. R package version 1.13.0,
  <https://bioconductor.org/packages/dir.expiry>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {dir.expiry: Managing Expiration for Cache Directories},
    author = {Aaron Lun},
    year = {2022},
    note = {R package version 1.13.0},
    url = {https://bioconductor.org/packages/dir.expiry},
  }