ubuntu18.04: Installs in pg11

Thanks for a nice and useful project.

When installing on ubuntu 18.04 LTS via

sudo pgxn install postgresql_anonymizer

It installs in postgres 11 even that version is not installed on the system. Only version 12 is: .. .. /usr/bin/install -c -m 644 anon.bc '/usr/lib/postgresql/11/lib/bitcode'/anon/./ cd '/usr/lib/postgresql/11/lib/bitcode' && /usr/lib/llvm-6.0/bin/llvm-lto -thinlto -thinlto-action=thinlink -o anon.index.bc anon/anon.bc

Where can I set the target (ex: pg 12)?

best

/Jan