Use right version of Iris...

1 job for master in 15 minutes and 39 seconds (queued for 9 seconds)
Name Stage Failure
failed
build-iris.dev 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 0m22.002s
user 1m55.244s
sys 0m5.904s
ERROR: Job failed: exit code 1