+ </DL>
+
+ <H2>Implementation-specific notes</H2>
+
+ <DL>
+ <DT><A HREF="http://www.haskell.org/ghc/">GHC/GHCi</A></DT>
+ <DD>
+ Most of the time, all the packages are available without the
+ need to use any additional command-line options. The only
+ time when this is not the case is when linking a program on the
+ command line, without using the <tt>--make</tt> option: in this
+ case you must list all the packages to link to by adding the
+ <tt>-package</tt> <i>P</i> flag (where <i>P</i> is the package
+ name) to the command line for each package.
+ See the <a href="users_guide/users-guide.html">User's Guide</a>
+ for more details.
+ </DD>
+
+ <DT><A HREF="http://www.haskell.org/hugs/">Hugs 98</A></DT>
+ <DD>
+ Hugs provides almost all of the modules in the
+ <A HREF="base/index.html"><TT>base</TT></a> package
+ and all the modules in the
+ <A HREF="haskell98/index.html"><TT>haskell98</TT></a>,
+ <A HREF="network/index.html"><TT>network</TT></a>,
+ <A HREF="parsec/index.html"><TT>parsec</TT></a> and
+ <A HREF="haskell-src/index.html"><TT>haskell-src</TT></a> packages.
+@unixHTMLStart@
+ Most of the modules in the <A HREF="unix/index.html"><TT>unix</TT></a> package are supported, too.
+@unixHTMLEnd@
+ All those modules are always available, as a single hierarchy;
+ Hugs does not use the package subdivision.
+ </DD>
+
+ <DT><A HREF="http://www.haskell.org/nhc98/">Nhc98</A></DT>
+ <DD>
+ To use modules from a package <i>P</i> with Nhc98,
+ add the compile-time option <tt>-package</tt> <i>P</i>.
+ Nhc98 currently provides many of the modules in the
+ <tt>base</tt> package (see the
+ <a href="http://www.haskell.org/nhc98/libraries.html">Nhc98 libraries page</a>
+ for a list).
+ </DD>
+
+ </DL>