Add a cross-ref to the section on Packages from the mention of the
-package flag in the section on linking.
</Para>
<Para>
-If you are using a Haskell “system library” (e.g., the POSIX
-library), just use the <Option>-package posix</Option> option, and the correct code
-should be linked in.
+If you are using a Haskell “package” (e.g., the POSIX
+library), just use the <Option>-package posix</Option> option, and the
+correct code should be linked in. See <xref linkend="packages"> for
+more details.
</Para>
</ListItem>
</VarListEntry>