The following packages have unmet dependencies:
 libc-dev-bin : Depends: libc6 (> 2.28) but 2.24-11+deb9u4 is to be installed
 libc6-dev : Depends: libc6 (= 2.28-10) but 2.24-11+deb9u4 is to be installed
 postgresql : Depends: postgresql-11 but it is not going to be installed
 postgresql-contrib : Depends: postgresql-contrib-11
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).