Unique statements with `WHERE`

How would i go about creating the following in drizzle? I have tried a few different ways and apparently im missing something

CREATE UNIQUE INDEX uq_tags_public_name
  ON tags ((lower(name))) WHERE scope='PUBLIC';

CREATE UNIQUE INDEX uq_tags_public_name
  ON tags ((lower(name))) WHERE scope='PUBLIC';

Unique statements with `WHERE` - Drizzle Team