Merge: nixos/postgresql: fix condition for readwritepaths (#372164)

          ] ++ lib.optionals (any extensionInstalled [ "plv8" ]) [ "@pkey" ];

          UMask = if groupAccessAvailable then "0027" else "0077";

        }

        (mkIf (cfg.dataDir != "/var/lib/postgresql") {

        (mkIf (cfg.dataDir != "/var/lib/postgresql/${cfg.package.psqlSchema}") {

          # The user provides their own data directory

          ReadWritePaths = [ cfg.dataDir ];

        })

        (mkIf (cfg.dataDir == "/var/lib/postgresql/${cfg.package.psqlSchema}") {

          # Provision the default data directory

          StateDirectory = "postgresql postgresql/${cfg.package.psqlSchema}";

          StateDirectoryMode = if groupAccessAvailable then "0750" else "0700";

        })