Docs to install packages from system-specific list

Also uses a slightly simpler command to get the package list

1 files changed, 7 insertions, 3 deletions

diff --git a/installing/manual_install.md b/installing/manual_install.md
index e72d8a130..8d69e7273 100644
--- a/installing/manual_install.md
+++ b/installing/manual_install.md
@@ -67,12 +67,16 @@ and `bundler` using `apt`; so if you're running Ubuntu, you won't be able to
 use the above repositories. Instead, comment out those two lines in
 `config/packages` before following the next step (and install bundler manually).
 
-Now install the packages that are listed in config/packages using apt-get:
+Now install the packages relevant to your system using apt-get:
 
-    sudo apt-get install `cut -d " " -f 1 config/packages | grep -v "^#"`
+    # Debian Squeeze
+    sudo apt-get install $(cat config/packages.debian-squeeze)
+
+    # Ubuntu Precise
+    sudo apt-get install $(cat config/packages.ubuntu-precise)
 
 Some of the files also have a version number listed in config/packages - check
-that you have appropriate versions installed. Some also list "|" and offer a
+that you have appropriate versions installed. Some also list "`|`" and offer a
 choice of packages.
 
 ## Install Ruby dependencies