Error: Unknown Usage/Linking Requirements ######################################### A library can declare that it *uses* or *links* to another library by using the ``uses`` and ``links`` keys in ``library.json5``, respectively. These requirements are specified by using the ``namespace/name`` pair that identifies a library. These are defined by both the project's dependencies and the project itself. If a ``uses`` or ``links`` key does not correspond to a known library, ``dds`` will not be able to resolve the usage requirements, and will generate an error. To fix this issue, ensure that you have correctly spelled the library identifier and that the package that contains the respective library has been declared as a dependency of the library that is trying to use it.