doc: Mention zeroed mtimes in the binary tarball.

Fixes <http://bugs.gnu.org/21111>.
Reported by Dave Love <fx@gnu.org>.

* doc/guix.texi (Binary Installation): Add paragraph about "implausibly old
  time stamps" warning from tar.
This commit is contained in:
Ludovic Courtès 2015-07-22 22:52:37 +02:00
parent d490d06e0f
commit aafa0dffb1
1 changed files with 6 additions and 0 deletions

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@ -308,6 +308,12 @@ This creates @file{/gnu/store} (@pxref{The Store}) and @file{/var/guix}.
The latter contains a ready-to-use profile for @code{root} (see next The latter contains a ready-to-use profile for @code{root} (see next
step.) step.)
Some versions of GNU@tie{}tar raise a warning about ``implausibly old
time stamps''. This is because all the files in the archive have their
modification time set to zero (which means January 1st, 1970.) This is
done on purpose to make sure the archive content is independent of its
creation time, thus making it reproducible.
Do @emph{not} unpack the tarball on a working Guix system since that Do @emph{not} unpack the tarball on a working Guix system since that
would overwrite its own essential files. would overwrite its own essential files.