diff --git a/BUILDING.txt b/BUILDING.txt
index d566dced8d..29bff518f9 100644
--- a/BUILDING.txt
+++ b/BUILDING.txt
@@ -55,13 +55,26 @@ NOTE: This has not been fully tested in non-Windows environments
 yet, so we don't have instructions for that yet.
 
 
-4) Compile Autopsy
-4a) using Netbeans IDE:
+4) Get Autopsy source.
+4a) If you are not planning to contribute to Autopsy development, clone a read-only repository:
+
+git clone https://github.com/sleuthkit/autopsy.git
+
+4b) if you plan to contribute and submit patches, login to Github and create your own Autopsy fork.
+Then, clone your fork and work on that source-tree:
+
+git clone https://github.com/YOUR_USERNAME/autopsy.git
+
+You will be able to submit patches by committing and pushing changes to your fork 
+and by submitting pull requests to the main Autopsy repository.
+
+5) Compile Autopsy
+5a) using Netbeans IDE:
 - Start NetBeans IDE and open the Autopsy project.
 - Choose to build the Autopsy project / module.  It is the highest
 level project that will then cause the other modules to be compiled.
 
-4b) without Netbeans IDE (requires JDK and ant >= 1.7.1):
+5b) without Netbeans IDE (requires JDK and ant >= 1.7.1):
 - from root directory of Autopsy source execute:
 ant build
 (to build Autopsy)