Re: Thomas Munro > But then why does that only happen on the salsa build, > not on the apt.postgresql.org one?
The build chroots there have postgresql-NN already installed so extension builds don't have to download 7 PG versions over and over. My guess would be that that's the difference and it's using some pg_config from /usr/bin or /usr/lib/postgresql/*/bin. I can confirm that it's also failing in my local chroots if none of the postgresql-* packages are preinstalled. Christoph