Add some more detail about arv's dependencies and how to install them.

diff --git a/doc/user/tutorial-job1.textile b/doc/user/tutorial-job1.textile
index 8860b8e1af774bfb017804e0021facd87e82980c..673d47293ee3552040b00d79790fa866e164f1ea 100644 (file)
--- a/doc/user/tutorial-job1.textile
+++ b/doc/user/tutorial-job1.textile
@@ -17,6 +17,12 @@ h3. Prerequisites
 
 If everything is set up correctly, the command @arv -h user current@ will display your account information.
 
+Arv depends on a few gems. It will tell you which ones to install, if they are not present yet. If you need to install the dependencies and are doing so as a non-root user, make sure you set GEM_HOME before you run gem install:
+
+<pre>
+    export GEM_HOME=~/.gem
+</pre>
+
 h3. Submit a job
 
 We will run the "hash" program, which computes the MD5 hash of each file in a collection.