When deploying the image, we get an warning message as such. See [this Travis CI build](https://travis-ci.org/unee-t/frontend/builds/647164050#L343) for a example of that error.  In Travis CI, implementing the suggest solution from the warning message `meteor npm install --save bcrypt`  has no effect Googling the problem leads to a [known Issue on the Meteor git Repo](https://github.com/meteor/meteor/issues/10398). The solution seems to be : Make sure you have the [node-gyp build tools](https://github.com/nodejs/node-gyp#on-unix) installed before installing `bcrypt` . `bcrypt` needs to build a binary, and the tools needed to do that are not installed on systems by default. # TODO: Check how we can change our `.travis.yml` and `Dockerfile` files to make sure that make sure you have the [node-gyp build tools](https://github.com/nodejs/node-gyp#on-unix) installed