Improve descriptoin of deb.haskell.org repo

README.md

@@ -47,10 +47,10 @@ This only works when your current working directory is a cabal sandbox.
 ### Debian
 
 #### GHC Repository for debian stable
-If you use debian stable, it is easier to use this: http://deb.haskell.org/. After installing GHC:
-- Get `cabal-install` source at https://www.haskell.org/cabal/download.html
-- Run `bootstrap.sh`
-- Run `cabal update && cabal install cabal cabal-install alex happy`
+If you use Debian stable, it is easier to use http://deb.haskell.org/. To use this:
+- Add the line `deb http://deb.haskell.org/stable/ ./` to `/etc/apt/sources.list`
+- run `sudo apt-get update`
+- run `sudo apt-get install ghc-7.8.3 happy alex cabal-install`
 
 #### Using Ubuntu PPA
 If you're not using stable, you can follow the same steps as Ubuntu, but has to execute an additional command. Immediately after `sudo add-apt-repository -y ppa:hvr/ghc` is ran, run: