It looks like [`eslint-config-prettier`](https://www.npmjs.com/package/eslint-config-prettier) is in the [`dependencies` section of `package.json`](https://github.com/node-loader/node-loader-core/blob/0adf95ce577e74a28d5643c753bff176cd658c24/package.json#L45) - judging by where all the other `eslint` packages are, I'm guessing it should be in `devDependencies`.