Yeap, looks like the exact same issue.

Answering your questions from the bug conversation:
1. # guix-daemon —version
guix-daemon (GNU Guix) 0.9.0
2. # df /tmp
Filesystem 1K-blocks Used Available Use% Mounted on
unionfs 2854060 830856 2023204 30% /

On /mnt/tmp it should be ext4 because I formatted whole partition after creation (mkfs.ext4).

Thanks.

Best regards,
dptd

On 21 Mar 2016, at 10:23, Ludovic Courtès <ludo@gnu.org> wrote:

dptdescribe <dptdescribe@gmail.com> skribis:

tests/store.scm
guix system: error: build failed: build of `/gnu/store/…db1-guix-0.9.0.71e2065.drv’ failed

This looks like what’s reported at <http://bugs.gnu.org/23056>.

Could you answer the questions I asked there?  :-)

Thanks,
Ludo’.