Force ruby1.9.3 install. (refs #2221)

diff --git a/docker/build.sh b/docker/build.sh
index 9473e015b8e3845033a6adb24c5693cc16cd9317..add3194f52ab412dab965e621bdb24832ebec8f7 100755 (executable)
--- a/docker/build.sh
+++ b/docker/build.sh
@@ -1,11 +1,11 @@
 #! /bin/bash
 
-# make sure Ruby is installed before proceeding
-if ! ruby -v > /dev/null 2>&1
+# make sure Ruby 1.9.3 is installed before proceeding
+if ! ruby -v 2>/dev/null | grep '1\.9\.3' > /dev/null
 then
     echo "Installing Ruby. You may be required to enter your password."
     sudo apt-get update
-    sudo apt-get install ruby
+    sudo apt-get -y install ruby1.9.3
 fi
 
 ./build.rb $*