Invenio-Search is on PyPI. When you install Invenio-Search you must specify the appropriate extras dependency for the version of Elasticsearch or OpenSearch you use:
$ # For Elasticsearch 7.x:
$ pip install invenio-search[elasticsearch7]
$ # For OpenSearch 2.x:
$ pip install invenio-search[opensearch2]Also note that installing multiple conflicting dependencies (e.g. invenio-search[opensearch2,elasticsearch7]) will result in an error at runtime.