Anacron (run as non-root user) can't get password with secret-tool

I have set up anacron for a non-root user ("myuser") to run several scripts. All of them work well, except the ones where I use secret-tool to get a password from the keyring.

I have tried to run these scripts from the command line (same user) and they run without any issue.

To reproduce:

1. Store a password in the keyring with secret-tool:

secret-tool store --label=bugtest bugreport password

enter "test" as password

2. Create the file ~/.anacron/anacrontab with this content

SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
HOME=/home/myuser
LOGNAME=myuser

1 2 cron.bug echo "the password is $(secret-tool lookup bugreport password)" > /home/myuser/.anacron/output

3. Create a crontab to run myuser's anacron:

*/5 * * * * /usr/sbin/anacron -t /home/myuser/.anacron/anacrontab -S /home/myuser/.anacron/spool

4. Wait for 7 minutes and then check /home/myuser/.anacron/outuput. It will just contain this line:

the password is

5. Run the same command from the command line and check that file again, it contain:

the password is test

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: anacron 2.3-19ubuntu2
ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Thu Feb 6 19:04:43 2014
InstallationDate: Installed on 2013-10-21 (107 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
MarkForUpload: True
SourcePackage: anacron
UpgradeStatus: No upgrade log present (probably fresh install)