<para>
Before you start, make sure you've installed the Cygwin packages
<filename>openssh</filename>, <filename>openssl</filename>,
-<filename>cvs</filename>, <filename>gdbm</filename> (needed by cvs), <filename>m4</filename> and
+<filename>cvs</filename>, <filename>gdbm</filename> (needed by cvs),
+<filename>zlib</filename> (needed by cvs), <filename>m4</filename> and
<filename>autoconf</filename>. Do not install the <filename>cygwin</filename>
package; the bits of it you need are supplied with GHC. You also need to make sure that the
user environment variable <Constant>MAKE_MODE</Constant> is set to <Literal>UNIX</Literal>. If you don't do