Update install instructions on landing page

index.html

@@ -33,40 +33,46 @@ <h2>Introduction</h2>
     <h2><a href="#install-upgrade">Install/Upgrade <span class="inline-code">cabal</span></a></h2>
 
     <p>
-      To install the <span class="inline-code">cabal</span> executable you can
-      use <a href="https://gitlab.haskell.org/haskell/ghcup-hs">ghcup</a> (if you're using
-      Linux), the <a href="https://www.haskell.org/platform/">Haskell
-      Platform</a>, install the <span class="inline-code">cabal-install</span>
-      package from your distributions package manager (if using Linux or Mac),
-      or download the source or prebuilt binary from
-      the <a href="download.html">Download</a> page.
+      The recommended method to install the <span class="inline-code">cabal</span> executable
+      is to use <a href="https://www.haskell.org/ghcup/">ghcup</a>, which can manage multiple
+      versions of <span class="inline-code">cabal</span> on Linux, Mac and Windows.
+      Alternatively, you can install <span class="inline-code">cabal</span> using your
+      distribution's package manager (if you are using Linux or Mac), or download the source
+      or prebuilt binary from the <a href="download.html">Download</a> page.
+    </p>
 
     <p>
-      If you already have the <span class="inline-code">cabal</span> executable you can upgrade it by running:
+      If you have installed <span class="inline-code">cabal</span> using <a href="https://www.haskell.org/ghcup/">ghcup</a>,
+      then you can also upgrade it using <span class="inline-code">ghcup</span>.
+      If you installed the <span class="inline-code">cabal</span> executable using a different method, 
+      you can upgrade it by running:
       <code>
 	<span class="code-unselectable"data-text="$ "></span>cabal install cabal-install
       </code><br>
+      This will install the cabal executable in cabal's <span class="inline-code">installdir</span>
+      (usually <span class="inline-code">~/.local/bin</span>). In order to use this executable,
+      you have to make sure that this directory appears in the <span class="inline-code">$PATH</span>
+      variable before the location where your current <span class="inline-code">cabal</span> executable is located.
+      You can check which version of the <span class="inline-code">cabal</span> executable
+      you are running by executing the command below.
+      <code>
+        <span class="code-unselectable" data-text="$ ">cabal --version</span>
+      </code>
     </p>
 
     <p>
-      If the above command failed for any reason see the <a href="#troubleshooting">Update Troubleshooting</a> section below.
-    </p>
-
-    <p>
-      Sometimes the older installed version is still on the program search
-      <span class="inline-code">$PATH</span>, you can check you're running the
-      latest version with the command below. If it doesn't match the output of
-      the <span class="inline-code">cabal-install</span> command above you'll
-      need to replace the old executable with the new one.<br>
-
-      <code>
-	<span class="code-unselectable" data-text="$ ">cabal --version</span>
-      </code>
+      If the update failed for any reason, see the <a href="#troubleshooting">Update Troubleshooting</a> 
+      section below.
     </p>
 
     <h2>Quick Start Guide</h2>
 
-    <p>Start by installing the <span class="inline-code">cabal</span> executable (see <a href="#install-upgrade">the previous section</a>) and the Haskell compiler <span class="inline-code">ghc</span> (see <a href="https://www.haskell.org/ghc/download.html">the GHC download docs</a>).</p>
+    <p>Start by installing the <span class="inline-code">cabal</span> executable
+      (see <a href="#install-upgrade">the previous section</a>) and the Haskell compiler
+      <span class="inline-code">ghc</span>.
+      It is also recommended to use <a href="https://www.haskell.org/ghcup/">ghcup</a> to install 
+      <span class="inline-code">ghc</span>.
+    </p>
 
     <h3>Starting a new project</h3>
     <p>