Tag: weak-library-dev-dependency Severity: error Check: debian/control/prerequisite/development Explanation: This package seems to contain the development files for a shared library, but the requirement for that shared library to be installed does not include the same version. . A -dev package should normally use (= ${binary:Version}) for the prerequisite on the shared library. That will ensure that programs compile and link properly. The symbolic links for the dynamic linker will also point to the correct places. . To be sure, there are some circumstances when a weak prerequisite is warranted, for example to prevent the breaking of binNMUs with architecture-independent -dev packages. Then something like (>= ${source:Upstream-Version}), (<< ${source:Upstream-Version}+1~) may be the right approach, or possibly ${source:Version} instead. The goal there is to ensure that a new upstream version of the library does not satisfy the prerequisite, since any minor version change might break the *.so links. See-Also: debian-policy 8.5