Travis sets the env var already and `normalizeBinary` will use that if set. I think the changes to that function in #37 won't work for env vars, is there a test for that? [Here](https://github.com/mozilla/jpm/blob/b8880e811fd96cfacc2af633fb2ea55669ec002a/lib/utils.js#L109) it continues to parse and check the OS/platform information and looks there even though if `binaryPath` was given (and should only change if OSX and not `.app`), and if a path was given in env var