diff --git a/hastymail/manifests/init.pp b/hastymail/manifests/init.pp
index 1eca291..340d9e8 100644
--- a/hastymail/manifests/init.pp
+++ b/hastymail/manifests/init.pp
@@ -1,9 +1,17 @@
 
 class hastymail {
 
+    if !$hastymail_package {
+        if $hastymail_package_latest {
+            $hastymail_package = $hastymail_package_latest
+        } else {
+            fail("Must define \$hastymail_package or \$hastymail_package_latest")
+        }
+    }
+
     file { "/usr/local/src/hastymail.tar.gz":
         ensure => present,
-        source => "puppet:///files/packages/hastymail.tar.gz",
+        source => "puppet:///files/packages/$hastymail_package",
         mode   => 0644,
         owner  => root,
         group  => root,