Where to put snowball files to add a snowball stemmer to PostgreSQL database?

I’ve downloaded Czech snowball stemmer source files (.c, .h files) and compiled them into .o files and I know the correct SQL syntax for adding the dictionary (it’s in the docs).

I keep getting the following error though.

ERROR: no Snowball stemmer available for language "czech" and encoding "UTF8"

Where should I put the files in the PG installation for the CREATE TEXT SEARCH DICTIONARY to get them?