shell used with ruby environment configurator

I'm trying to use the ruby environment configurator to build against different ruby versions and gemsets.  I'm getting the error that RVM is "not a function".

According to http://youtrack.jetbrains.com/issue/TW-26386:

"Ruby Env Configurator stores shell script as files and then run it with "/bin/bash -l script_file.sh""

When I set up a build with the Command Line Runner with a custom script that does "ps -fp $$", the output is:

Is this expected?  Are there any environment variables or configuration parameters that affect this?  ubuntu's shell is /bin/bash, and SHELL is /bin/bash in the build-agent's environment.