I would like to do this with nix instead of adding sqlfluff in my path.
{
sqlformat = {
enable = true;
hook = [
"(sql-mode-hook . sqlformat-on-save-mode)"
];
config = ''
(setq sqlformat-command "${pkgs.sqlfluff}/bin/sqlfluff")
(setq sqlformat-args '("fix" "-f" "-"))
'';
};
}