Update README.md
authorMoritz Angermann <moritz.angermann@gmail.com>
Wed, 23 Dec 2015 06:59:44 +0000 (14:59 +0800)
committerMoritz Angermann <moritz.angermann@gmail.com>
Wed, 23 Dec 2015 06:59:44 +0000 (14:59 +0800)
Adding missing prerequisites. These are probably installed if you build ghc often or use shake, but if not, these are missing.

README.md

index 5d87bc4..05e247e 100644 (file)
--- a/README.md
+++ b/README.md
@@ -8,6 +8,12 @@ This is supposed to go into the `shake-build` directory of the GHC source tree.
 Trying it
 ---------
 
+Prerequisits
+```
+$ cabal install alex
+$ cabal install shake
+```
+
 On Linux,
 ```
 $ git clone git://git.haskell.org/ghc