Isn't that path and the behavior of the binary defined by POSIX though? I thought it's as stable as you can get.
That's why it's usually recommended that you use /use/bin/env bash vs /bin/bash in the shebang, as the latter isn't defined by POSIX
I don't see anything about the path being defined. Certainly possible I missed it, though.
I'm not able to check right now but I vaguely recall that I've used a system in the past with env in a location other than /usr/bin.
