couchdb stopped finding right erlang after cmake conversion

Previously it was enough to set PATH to point to some specific version of erlang you wanted to test against. Particularly this is what I routinely did on kingstar machine:

export PATH=/opt/r14b04/bin:$PATH

And that worked because all erlang header and libs where located using erlang itself always doing the right thing. I.e. in this case it would link against R14 and not system-wide erlang.

Now it doesn't work. Causing inability to switch erlang version for purpose of testing. Which is pretty big deal for me.