Using black box with pg_dump parameters

When using the back box mode is it possible to pass in some parameters?

When I run the following I get an output which includes some "drop if exists" statements

pg_dump --create -O -x --format p -h HOST_NAME -U USER_NAME DATABASE > ./dump.sql

But when I then pass this dump into the black box it outputs without these statements

IMG=registry.gitlab.com/dalibo/postgresql_anonymizer:stable
ANON="docker run --rm -i $IMG /anon.sh"
cat dump.sql rules.sql | $ANON > anon_dump.sql

Is it possible to include these?