If any of the dependencies have been installed in a nonstandard directory, we need to pass this information to the `configure` script. Suppose again these have been installed in the `$HOME/.local` directory. In this case we need
(typically, in such cases we also want to install the library itself in the home directory; for this we need to combine with the options in the previous section.)
Before we try to use the library, we must be sure that the *dynamic linker* knows where to find the libraries that were installed in nonstandard directories. In modern OSs, the path `$HOME/.local/lib` is already in the standard path, but if this is not the case we need to set `LD_LIBRARY_PATH`