why is relations.ts not generated?

I updated drizzle-kit and run

drizzle-kit introspect:pg --connectionString=$SUPABASE_CONNECTION_STRING --driver=pg --out=src/clients/pg/.drizzle

drizzle-kit introspect:pg --connectionString=$SUPABASE_CONNECTION_STRING --driver=pg --out=src/clients/pg/.drizzle

yet see no relations.ts generated in the out directory. Any ideas?