Reported by anthk_ on #guix in Sept. 2015.
* gnu/system/install.scm (self-contained-tarball): Use --mtime=@1
instead of --mtime=@0.
(with-directory-excursion %root
(zero? (system* "tar" "--xz" "--format=gnu"
- ;; avoid non-determinism in the archive
+ ;; Avoid non-determinism in the archive. Use
+ ;; mtime = 1, not zero, because that is what the
+ ;; daemon does for files in the store (see the
+ ;; 'mtimeStore' constant in local-store.cc.)
"--sort=name"
- "--mtime=@0" ;for files in /var/guix
+ "--mtime=@1" ;for files in /var/guix
"--owner=root:0"
"--group=root:0"