Parallel release failed on pwd_mkdb

Hi All!

We got this build failure, when two release make release running in parallel:

10-STABLE:
-----------------

--------------------------------------------------------------
>>> stage 4.4: building everything
--------------------------------------------------------------
pwd_mkdb: /var/tmp/temproot/etc/pwd.db.tmp to
/var/tmp/temproot/etc/pwd.db: No such file or directory
*** Error code 1

Stop.
make[4]: stopped in /jenkins/workspace/HardenedBSD-10-STABLE-amd64/etc
*** Error code 1

Stop.
make[3]: stopped in /jenkins/workspace/HardenedBSD-10-STABLE-amd64
*** Error code 1

Stop.
make[2]: stopped in /jenkins/workspace/HardenedBSD-10-STABLE-amd64

  *** FATAL ERROR: Cannot 'cd' to
/jenkins/workspace/HardenedBSD-10-STABLE-amd64/release/.. and install
files to
      the temproot environment

*** Error code 1

Stop.
make[1]: stopped in /jenkins/workspace/HardenedBSD-10-STABLE-amd64/release
*** Error code 1


11-CURRENT:
--------------------

pwd_mkdb -i -p -d /var/tmp/temproot/etc /var/tmp/temproot/etc/master.passwd
pwd_mkdb: /var/tmp/temproot/etc/pwd.db.tmp: File exists
*** Error code 1

Stop.
make[4]: stopped in /jenkins/workspace/HardenedBSD-master-amd64/etc
*** Error code 1

Stop.
make[3]: stopped in /jenkins/workspace/HardenedBSD-master-amd64
*** Error code 1

Stop.
make[2]: stopped in /jenkins/workspace/HardenedBSD-master-amd64

  *** FATAL ERROR: Cannot 'cd' to
/jenkins/workspace/HardenedBSD-master-amd64/release/.. and install
files to
      the temproot environment

*** Error code 1

Stop.
make[1]: stopped in /jenkins/workspace/HardenedBSD-master-amd64/release
*** Error code 1

I could work it around with build order dependency or with chrooted builds...

Thanks,
Oliver