+# More repositories for postgresql 11 (CentOS default 'postgresql' is 9.2), postgis
+# and llvm-toolset (https://github.com/theory/pg-semver/issues/35)
+
+ sudo yum install -y https://download.postgresql.org/pub/repos/yum/11/redhat/rhel-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
+ sudo yum install -y centos-release-scl-rh
+