Inserting into text array column when using unnest() [duplicate]

I have a table with the follow definition:

CREATE TABLE "test" (
    id UUID PRIMARY KEY,
    created TIMESTAMPTZ NOT NULL,
    description TEXT,
    permissions TEXT[]
);

I want to bulk insert into the table using unnest() and be able to ignore the update if there is a conflict:

INSERT INTO test (id, created, description, permissions)
SELECT unnest($1::uuid[]), unnest($2::timestamptz[]), unnest($3::text[]), unnest($4::text[][])
ON CONFLICT (user_id, session_id, confirmation_code_hash) DO NOTHING

The arguments passed in are:

• Array of UUIDs
• Array of timestamps
• Array of texts
• Array of array of texts

The problem is that unnest() flattens the array of array of texts completely, where as I would just like to flatten the first dimension and insert an array of text into each column.

Is there any way to use unnest() for bulk insertion of array columns?