Etlas doesn't handle internal libraries properly

[rahulmutt]

$ etlas install unpacked-containers
...
Installing internal library utils in /Users/rahulmuttineni/.etlas/store/eta-0.8.4.1/incoming/new-3695/Users/rahulmuttineni/.etlas/store/eta-0.8.4.1/unpacked-containers-0-b4159bbcadc5a8732fa638f4f75108460012d252b620db9d744090ef86e9db4d/lib
etlas: Error: Could not find module: Internal.BitUtil with any suffix: ["hi"]
in the search path: ["dist/build/utils"]
...