FWIW, I just built (and only built!) sqllineage from source, with the sqlfluff dependency set to 3.1.1 - all tests are passing, without any further change in sqllineage.

This would suggest that locally you could simply run sqllineage in a virtual environment of its own, and then simply upgrade the sqlfluff dependency using pip?

(Granted a new release of sqllineage with latest sqlfluff would be more convenient, but then sqlfluff seems to move at an astonishing pace, which I can imagine makes it challenging to track that)

FWIW, I verified that running

pip install --upgrade https://github.com/sqlfluff/sqlfluff/tarball/master

in "my" sqllineage Python virtual environment did complete to success (I needed sqlfluff master)

I also got the graph and the output that I wanted out of that hot-patched installation of sqllineage.

Your mileage may vary.