Invenio-Records-Marc21 is on PyPI so all you need is:
$ pip install invenio-records-marc21
Choose a version of elasticsearch and a DB, if you want to test the module. The installation [options] supported for the Marc21 module:
docs
- for documentation building dependencies;
elasticsearch7
- to use elasticsearch version 7 backend;
postgresql
- to use PostgreSQL database backend;
tests
- for test dependencies.
An example installation:
pip install -e .[all,elasticsearch7,postgresql]