#hypothes.is

<robertknight> @rolmovel - Did you use “npm” or “yarn” to install dependencies?

<robertknight> It looks like the repository has lockfiles for both npm (package-lock.json) and yarn (yarn.lock). The version of Babel referenced by package-lock.json appears to be wrong.

<robertknight> So to fix this: 1. Get Yarn (https://yarnpkg.com/lang/en/) 2. Remove the `node_modules/` folder in your client checkout 3. Run `yarn` in the client dir to re-create the `node_modules/` folder with correct dependencies

<robertknight> I just removed the `package-lock.json` file from the client’s repo which I think was the source of your problem @rolmovel.

<rolmovel> Thanks @robertknight, I have tried to delete package-lock.json, but this didn´t work. Finally I updated version of babel-preset-es2015 and babelify and this worked.

<rolmovel> I have configured 6.24.1 for babel-preset-es2015 and 8.0.0 for bablify

<rolmovel> Thanks for your help

<robertknight> No problem. That’s a later version of the packages than the ones specified in `yarn.lock` but I guess they will still work if there haven’t been breaking changes to how Babel is configured in the latest release.

<robertknight> What changes are you looking to make to the client btw?

<dwhaley> @segdeha ^