Fill out the downloads page

static/markdown/downloads.md

@@ -1,6 +1,15 @@
 # Downloads
 
-The Haskell Platform was a comprehensive, robust development
+## Package manager
+
+If you are using an operating system which has an up-to-date package
+set, you may be able to simply install everything via that.
+
+* [Arch Linux Haskell package guidelines](https://wiki.archlinux.org/index.php/Haskell_Package_Guidelines)
+
+## Haskell Platform
+
+The Haskell Platform is a comprehensive, robust development
 environment for programming in Haskell. For new users the platform
 makes it trivial to get up and running with a full Haskell development
 environment.
@@ -8,3 +17,52 @@ environment.
 For experienced developers, the platform provides a comprehensive,
 standard base for commercial and open source Haskell development that
 maximises interoperability and stability of your code.
+
+[Download now →](http://www.haskell.org/platform/)
+
+## Advanced setup
+
+Alternatively one can manually install GHC and Cabal packages, but
+note, is particularly easier on POSIX (e.g. Linux, BSD, OS X) systems.
+
+### 1. Install GHC
+
+GHC has its own web site with license information, FAQ, download links
+and changelogs. Depending on your operating system, there should be a
+package made for its package manager, otherwise (e.g. Windows) it will
+be an installer.
+
+You can also download the .tar.gz/.zip and unpack and install the
+executables and so forth manually.
+
+Or you can even install from source, for which
+[there is documentation](https://ghc.haskell.org/trac/ghc/wiki/Building).
+
+[Download GHC now →](https://www.haskell.org/ghc/download)
+
+### 2. Install Cabal-install
+
+After installing GHC, you will want the Haskell package manager:
+
+[Get the Cabal archive →](http://hackage.haskell.org/package/cabal-install)
+
+Download the tar.gz file, extract and inside the resulting directory,
+run:
+
+    $ sh ./bootstrap.sh
+
+This will automatically download and install all the packages
+necessary to setup Cabal install.
+
+Once complete, you should add `$HOME/.cabal/bin` to your PATH. A
+simple way to do this is to edit your `~/.bashrc` and place in there:
+
+    export PATH=$HOME/.cabal/bin:$PATH
+
+Now you should be able to run cabal:
+
+    $ cabal --version
+    cabal-install version 1.18.0.2
+    using version 1.18.1.2 of the Cabal library
+
+And can start writing Haskell programs and installing packages!