Is there documentation on what needs to be done to run wikidata-query-rdf on my custom Wikibase install, so that I could do SPARQL queries on it?

When following the instructions at:

but using my own RDF file, I get this in the munge:

...

 Expected only sitelinks and subjects starting with http://www.wikidata.org/wiki/Special:EntityData/ and http://www.wikidata.org/entity/

even if the all the URLs start with http://www.wikidata.org/entity/

They originally did not - the exported RDF was using my own namespace but I did a substitution before running the munge.

Thanks!

Cheers

Miguel