Debian and SOURCE_DATE_EPOCH=0

[Ludovic Courtès]

Hello,

Simon Josefsson via rb-general <rb-general at lists.reproducible-builds.org> skribis:

> HP-UX 'make' treats mtime 0 as a missing file, and POSIX encourage it:
>
> https://lists.gnu.org/archive/html/bug-gnulib/2024-12/msg00209.html
> https://lists.gnu.org/archive/html/bug-gnulib/2024-12/msg00227.html
>
> If you want to depend on GNU make behaviour, all is good.

The Nix build daemon (and thus the Guix daemon) “forever” used mtime = 1
to work around software that gives mtime == 0 special treatment:

  https://github.com/NixOS/nix/commit/14bc3ce3d6d5745717fa19b8b43b5fdd117ff757

It’s probably safer to avoid mtime == 0!

Ludo’.