Ah! Thank you for the tip on the migration_lock_option! I’ll definitely look into that.
I couldn’t make your example work since it’s missing a dependency:
Replace {:sqlitex, "~>1.7.1", path: "deps/sqlitex"} with {:sqlitex, "~>1.7.1"} in mix.exs. I use path to sprinkle dependencies’ code with IO.inspect 
