Update README.md

rob-solana · web-flow · commit 872adf1031b1 · 2018-11-20T16:48:18.000-08:00
diff --git a/README.md b/README.md
@@ -290,7 +290,7 @@ $ rustup update
 On Linux systems you may need to install libssl-dev, pkg-config, zlib1g-dev, etc.  On Ubuntu:
 
 ```bash
-$ sudo apt-get install libssl-dev pkg-config zlib1g-dev
+$ sudo apt-get install libssl-dev pkg-config zlib1g-dev llvm
 ```
 
 Download the source code:
