The CI HHVM build job has been failing for some time now. The hhvm binary seems to be missing on the integration slaves.
18:13:50 [php-compile-hhvm] $ /bin/bash -xe /tmp/hudson3624562307582804444.sh 18:13:50 + hhvm --version 18:13:50 /tmp/hudson3624562307582804444.sh: line 2: hhvm: command not found 18:13:50 Build step 'Execute shell' marked build as failure 18:13:50 Finished: FAILURE