prepare for API-triggered builds

1 job for master in 5 minutes and 53 seconds (queued for 23 minutes and 48 seconds)
Name Stage Failure
failed Build
Makefile.coq:326: recipe for target 'all' failed
make[1]: *** [all] Error 2
Makefile:6: recipe for target 'all' failed
make: *** [all] Error 2

real 0m20.927s
user 0m43.808s
sys 0m3.396s
ERROR: Job failed: exit code 1