$ ibazel build //example:all
Error running Bazel exit status 7
Building //example:all
Files changed rebuilding...
ERROR: while parsing '//example:all': no such package 'example': BUILD file not found on package path.
INFO: Elapsed time: 0.182s
Build error: exit status 1
[ tool is now apparently hung ]

I think it's better to exit in this case (like iblaze does)