- Ability to run an arbitrary ruby script as the build command
- Ability to specify the PATH so as to put the desired Ruby
interpreter first on the list
Together with an install of multiruby, having this means that I can
execute Rails' own build file under any ruby I have installed as part
of a Cerberus build.
I've added a simple Ruby builder in my fork of the project.
Hopefully this can be pulled back into the official distribution in
the next round.