-Conflicts: libyazpp-dev, libyazpp2-dev
-Depends: libyazpp3 (= ${Source-Version}), libyaz3-dev
+Conflicts: libyazpp-dev, libyazpp2-dev, libyazpp3-dev, libyazpp4-dev
+Provides: libyazpp-dev
+Replaces: libyazpp-dev
+Depends: libyazpp5 (= ${Source-Version}), libyaz4-dev