I always default to `/usr/bin/env` for reasons outlined [here][]. It looks like a six-and-one-half situation: either way, we're breaking a system we're not targeting (by relying on `env` being in `/usr/bin`) to be more portable across other systems we're not targeting (by not relying on `sh` being in `/bin`)...

So, yeah, I'll probably just change it to the simpler `/bin/sh`.

[here]: http://en.wikipedia.org/wiki/Shebang_(Unix)#Portability