Fix build environment script.
Fix build environment script.

Script was missing a `/` for setting the `PATH` environment variable correctly.

svick/cli,dasMulli/cli,johnbeisner/cli,svick/cli,dasMulli/cli,livarcocc/cli-1,johnbeisner/cli,livarcocc/cli-1,svick/cli,johnbeisner/cli,livarcocc/cli-1,dasMulli/cli