diff --git a/doc/install/installation.md b/doc/install/installation.md
index addb21b..61903de 100644
--- a/doc/install/installation.md
+++ b/doc/install/installation.md
@@ -93,7 +93,7 @@ Then select 'Internet Site' and press enter to confirm the hostname.
 
 # 2. Ruby
 
-The use of ruby version managers such as [RVM](http://rvm.io/), [rbenv](https://github.com/sstephenson/rbenv) or [chruby](https://github.com/postmodern/chruby) with GitLab in production frequently leads to hard to diagnose problems. Version managers are not supported and we stronly advise everyone to follow the instructions below to use a system ruby.
+The use of ruby version managers such as [RVM](http://rvm.io/), [rbenv](https://github.com/sstephenson/rbenv) or [chruby](https://github.com/postmodern/chruby) with GitLab in production frequently leads to hard to diagnose problems. For example, GitLab Shell is called from OpenSSH and having a version manager can prevent pushing and pulling over SSH. Version managers are not supported and we stronly advise everyone to follow the instructions below to use a system ruby.
 
 Remove the old Ruby 1.8 if present
 
--
libgit2 0.21.2