Unfortunately, I had not installed the following package: "postgresql-server-dev-11" By the way, shouldn't a warning message appear while trying to run: `PATH=/usr/lib/postgresql/11/bin:$PATH make USE_PGXS=1` warning the user that some files are missing. Tia On 10/22/18, GPT <gptmailinglists@xxxxxxxxx> wrote: > Hi, > > Both PG versions 10.5 and 11 are installed. > > I have been trying to compile extensions for PG11 by using: > > PATH=/.../11/bin:PATH make USE_... > > but unfortunately PG10 is always being used (the `make` output always > shows PG10 and refers to `pg_config`). > > 1) Does it have to do with pg_config? > 2) How can I declare which PG version to be used in real time? > 3) How can I change which PG version to be used permanently? > > Tia >