[Concaveman](https://github.com/mapbox/concaveman) v2.0.0 only supports ESM and drops support for commonjs. Package.json of convex ```json "dependencies": { "@turf/helpers": "^6.5.0", "@turf/meta": "^6.5.0", "concaveman": "*" }, ``` suggestion, lock version of concaveman to v1.2.1 until turf drops support for commonjs