I run the following script and now it works:
CREATE OR REPLACE FUNCTION uuid_generate_v1()
RETURNS uuid
AS '$libdir/uuid-ossp', 'uuid_generate_v1'
VOLATILE STRICT LANGUAGE C;
Similar for all the other defined uuid functions.
Unfortunatelly I experienced the same problem on linux version 8.3.5. after
I installed the package. But there the same script doesn't work, and logs
that the file is not found.
Sabin