That's because of `eslint-plugin-graphql`. It wraps GraphQL source code into a js string tag, we supported this usage by mapping `graphql` to `babel` parser at https://github.com/prettier/eslint-plugin-prettier/pull/11. But `@graphql-eslint/eslint-plugin` works with a custom estree-compatible parser, then the mapping is incorrect for it. I'm going to raise a PR to support these two plugins/processors at the same time! Related to https://github.com/dotansimha/graphql-eslint/issues/395