ENOENT, no such file or directory

I’m using the https://github.com/auth0/meteor-auth0 package and it requires me to define environmental variables in an .env file in the root of the project. This works fine locally, but breaks when I deploy to Galaxy (or the free meteor.com hosting), with the following error in logs:

2016-03-03 00:23:05+09:00{ [Error: ENOENT, no such file or directory ‘/app/bundle/programs/server/.env’]
2016-03-03 00:23:05+09:00 errno: 34,
2016-03-03 00:23:05+09:00 code: ‘ENOENT’,
2016-03-03 00:23:05+09:00 path: ‘/app/bundle/programs/server/.env’,
2016-03-03 00:23:05+09:00 syscall: ‘open’ }

Any ideas how I could fix this? Thanks!