Update linux-instructions.md

diff --git a/Documentation/building/linux-instructions.md b/Documentation/building/linux-instructions.md
index 9a434a9b5e9b77cc3ddd86b7e27b2a761fe75b6f..69d04802d98f7fd3328f782e9857f78989c3b5f6 100644 (file)
--- a/Documentation/building/linux-instructions.md
+++ b/Documentation/building/linux-instructions.md
@@ -157,6 +157,7 @@ Make a `packages.config` file with the following text. These are the required de
 ```
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="System.Collections" version="4.0.0-beta-22703" />
   <package id="System.Console" version="4.0.0-beta-22703" />
   <package id="System.Diagnostics.Contracts" version="4.0.0-beta-22703" />
   <package id="System.Diagnostics.Debug" version="4.0.10-beta-22703" />