re-building the keyring package failed with this error

<pre>
remote: To ssh://git.parabola.nu:1863/~git/abslibre/abslibre.git
remote: ! [rejected] master -> master (fetch first)
remote: error: failed to push some refs to 'ssh://git@git.parabola.nu:1863/~git/abslibre/abslibre.git'
remote: hint: Updates were rejected because the remote contains work that you do
remote: hint: not have locally. This is usually caused by another repository pushing
remote: hint: to the same ref. You may want to first integrate the remote changes
remote: hint: (e.g., 'git pull ...') before pushing again.
remote: hint: See the 'Note about fast-forwards' in 'git push --help' for details.
remote:
remote: ==> ERROR: An unknown error has occurred. Exiting...
remote: ./hooks/post-receive: line 18: 19341 User defined signal 1 ~autobuilder/.local/bin/autobuild libre/parabola-keyring users
</pre>

there were other errors earlier in the build process:

<pre>
remote: -> Updating abslibre git repo...
remote: Fetching origin
remote: fatal: unable to look up git.parabola.nu (port 9418) (Name or service not known)
remote: error: Could not fetch origin
remote: ==> WARNING: Failure while updating abslibre git repo
remote: ==> Retrieving sources...
remote: -> Downloading parabola-keyring-20190406.tar.gz...
remote: % Total % Received % Xferd Average Speed Time Time Time Current
remote: Dload Upload Total Spent Left Speed
remote: 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
remote: curl: (22) The requested URL returned error: 404
</pre>

<pre>
remote: ==> Starting check()...
remote: ==> Entering fakeroot environment...
remote: ERROR: ld.so: object 'libfakeroot.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
remote: ERROR: ld.so: object 'libfakeroot.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
remote: ==> Starting package()...
</pre>

<pre>
remote: ==> Leaving fakeroot environment.
remote: ==> Finished making: parabola-keyring 20190406-1 (Sat Apr 6 10:00:18 2019)
remote: -> Downloading parabola-keyring-20190406.tar.gz.sig...
remote: % Total % Received % Xferd Average Speed Time Time Time Current
remote: Dload Upload Total Spent Left Speed
remote: 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
remote: curl: (22) The requested URL returned error: 404
remote: ==> Signing package...
remote: -> Created signature file /home/autobuilder/packages/srcdest/parabola-keyring-20190406.tar.gz.sig. /home/
</pre>