Creating backup into symlinked directory fails

2014-05-11 00:00:04,471 ERROR [QuartzScheduler_Worker-8] [ScheduledBackupJob] java.io.FileNotFoundException: /opt/atlassian/bamboo-home/backups/bamboo_backup_2014_05_11.zip/db-export/users.xml
java.io.FileNotFoundException: /opt/atlassian/bamboo-home/backups/bamboo_backup_2014_05_11.zip/db-export/users.xml
	at de.schlichtherle.truezip.file.TFileOutputStream.newOutputStream(TFileOutputStream.java:147)
	at de.schlichtherle.truezip.file.TFileOutputStream.<init>(TFileOutputStream.java:116)
	at com.atlassian.bamboo.migration.XmlMigrator.exportXml(XmlMigrator.java:424)
	...
Caused by: java.io.EOFException
	at de.schlichtherle.truezip.rof.AbstractReadOnlyFile.readFully(AbstractReadOnlyFile.java:37)
	at de.schlichtherle.truezip.rof.AbstractReadOnlyFile.readFully(AbstractReadOnlyFile.java:27)
	at de.schlichtherle.truezip.zip.RawZipFile.checkZipFileSignature(RawZipFile.java:172)
	...
	Suppressed: java.nio.file.FileSystemException: /opt/atlassian/bamboo-home/backups/bamboo_backup_2014_05_11.zip/db-export: Not a directory
		at sun.nio.fs.UnixException.translateToIOException(UnixException.java:91)
		at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
		...