Add GHC version info

README.md

@@ -2,9 +2,22 @@
 A C-like compiled programming language implemented in Haskell.
 
 ## Usage
+Note: You must have version 9.0 of the Haskell compiler GHC installed. Otherwise
+Cabal will not be able to obtain the necessary dependencies.
+
+It is recommended to use the provided `shell.nix` file to create the proper
+environment. Alternatively, you can run the project from the supplied
+binaries in the [releases](https://gitea.mregirouard.com/eta357/Windows-12-Compiler/releases)
+section.
+
 ```shell
 cabal run windows12 <input file> out.ll
 llc out.ll -o out.s
 gcc out.s -o out
 ./out
 ```
+
+## Running Tests
+```shell
+cabal run windows12-qc
+```