It sounds like your ROKU_DEV_TARGET environment variable did not get set. After editing your profile, you need to either source the profile (using the dot command) or logout and login again to create a new shell that reads the profile. You can verify whether the variable is set by typing
Thanks! tried grep, got nothing, logged off and back on, and now grep returns the correct string. I had assumed that quitting Terminal and reloading would be enough, but I guess this gets initialized only at logon.