Filed by: nbeleuzu [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=411684957&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/TFUT_Q_iQ5KUlwsZ8693Ew/runs/0/artifacts/public/logs/live_backing.log

[task 2023-04-07T12:14:01.422Z] 12:14:01     INFO -  package> 	/builds/worker/checkouts/gecko/browser/installer/package-manifest.in '../../dist' '../../dist'/firefox \
[task 2023-04-07T12:14:01.422Z] 12:14:01     INFO -  package>
[task 2023-04-07T12:14:01.422Z] 12:14:01     INFO -  package> error: $SRCDIR/browser/installer/package-manifest.in:113: Missing file(s): bin/vaapitest
[task 2023-04-07T12:14:01.422Z] 12:14:01    ERROR -  package> Traceback (most recent call last):
[task 2023-04-07T12:14:01.422Z] 12:14:01     INFO -  package>   File "/builds/worker/checkouts/gecko/toolkit/mozapps/installer/packager.py", line 295, in <module>
[task 2023-04-07T12:14:01.423Z] 12:14:01     INFO -  package>     main()
[task 2023-04-07T12:14:01.423Z] 12:14:01     INFO -  package>   File "/builds/worker/checkouts/gecko/toolkit/mozapps/installer/packager.py", line 252, in main
[task 2023-04-07T12:14:01.423Z] 12:14:01     INFO -  package>     copier.add(mozpath.join(respath, "removed-files"), removals)
[task 2023-04-07T12:14:01.423Z] 12:14:01     INFO -  package>   File "/builds/worker/fetches/python/lib/python3.8/contextlib.py", line 120, in __exit__
[task 2023-04-07T12:14:01.423Z] 12:14:01     INFO -  package>     next(self.gen)
[task 2023-04-07T12:14:01.424Z] 12:14:01     INFO -  package>   File "/builds/worker/checkouts/gecko/python/mozbuild/mozpack/errors.py", line 143, in accumulate
[task 2023-04-07T12:14:01.424Z] 12:14:01     INFO -  package>     raise AccumulatedErrors()
[task 2023-04-07T12:14:01.424Z] 12:14:01     INFO -  package> mozpack.errors.AccumulatedErrors
[task 2023-04-07T12:14:01.424Z] 12:14:01    ERROR -  package> gmake[5]: *** [/builds/worker/checkouts/gecko/toolkit/mozapps/installer/packager.mk:25: stage-package] Error 1
[task 2023-04-07T12:14:01.424Z] 12:14:01     INFO -  package> gmake[5]: Leaving directory '/builds/worker/workspace/obj-build/browser/installer'
[task 2023-04-07T12:14:01.425Z] 12:14:01     INFO -  package> gmake[5]: Target 'make-package-internal' not remade because of errors.
[task 2023-04-07T12:14:01.425Z] 12:14:01    ERROR -  package> gmake[4]: *** [/builds/worker/checkouts/gecko/toolkit/mozapps/installer/packager.mk:126: make-package] Error 2
[task 2023-04-07T12:14:01.425Z] 12:14:01     INFO -  package> gmake[4]: Target 'libs' not remade because of errors.
[task 2023-04-07T12:14:01.425Z] 12:14:01     INFO -  package> /usr/bin/gmake -C ../../browser/locales langpack
[task 2023-04-07T12:14:01.426Z] 12:14:01     INFO -  package> gmake[5]: Entering directory '/builds/worker/workspace/obj-build/browser/locales'
[task 2023-04-07T12:14:01.426Z] 12:14:01     INFO -  package> rm -f -rf ../../dist/xpi-stage/locale-en-US
[task 2023-04-07T12:14:01.426Z] 12:14:01     INFO -  package> gmake[5]: Leaving directory '/builds/worker/workspace/obj-build/browser/locales'
[task 2023-04-07T12:14:01.426Z] 12:14:01     INFO -  package> gmake[5]: Entering directory '/builds/worker/workspace/obj-build/browser/locales'
[task 2023-04-07T12:14:01.426Z] 12:14:01     INFO -  package> Making langpack
[task 2023-04-07T12:14:01.427Z] 12:14:01     INFO -  package> gmake[5]: Leaving directory '/builds/worker/workspace/obj-build/browser/locales'
[task 2023-04-07T12:14:01.427Z] 12:14:01     INFO -  package> gmake[6]: Entering directory '/builds/worker/workspace/obj-build/browser/locales'
[task 2023-04-07T12:14:01.427Z] 12:14:01     INFO -  package> ../../config/nsinstall -D ../../dist/install
[task 2023-04-07T12:14:01.427Z] 12:14:01     INFO -  package> gmake[6]: Leaving directory '/builds/worker/workspace/obj-build/browser/locales'
[task 2023-04-07T12:14:01.432Z] 12:14:01     INFO -  package> gmake[8]: Nothing to be done for 'pre-export'.
[task 2023-04-07T12:14:01.436Z] 12:14:01     INFO -  package> gmake[8]: Entering directory '/builds/worker/workspace/obj-build/browser/themes/shared/app-marketplace-icons'
[task 2023-04-07T12:14:01.436Z] 12:14:01     INFO -  package> ../../../../config/nsinstall -D ../../../../dist/xpi-stage/locale-en-US/browser
[task 2023-04-07T12:14:01.436Z] 12:14:01     INFO -  package> gmake[8]: Leaving directory '/builds/worker/workspace/obj-build/browser/themes/shared/app-marketplace-icons'
[task 2023-04-07T12:14:01.439Z] 12:14:01     INFO -  package> gmake[8]: Nothing to be done for 'compile'.

That may come from install changes. Will fix that if Bug 1787182 make it to trunk, otherwise I'll merge it there.
Thanks.

Addressed as D175323.