New comment by tornaria on void-packages repository https://github.com/void-linux/void-packages/issues/32638#issuecomment-904181484 Comment: > Using commit date is not for canonicality but reproducibility. Time should be adjusted even when build machine clock is set eariler than commit date. I wouldn't know how to avoid that in a simple way, is that a normal issue? Maybe the current date can be compared with the commit date and fail if it's older? > Are there any problems with `pari-elldata` files having build date? Not really. It just seemed a good idea to ship unmodified files with their original dates. Maybe I'm overthinking it. For the packages in question (PR #32641) I set `XBPS_USE_BUILD_MTIME=no`. Nothing breaks without this.