diff --git a/lib/nova_plugins/hypervisor-libvirt b/lib/nova_plugins/hypervisor-libvirt
index a6a87f9..f70b21a 100644
--- a/lib/nova_plugins/hypervisor-libvirt
+++ b/lib/nova_plugins/hypervisor-libvirt
@@ -26,7 +26,7 @@
 # --------
 
 # File injection is disabled by default in Nova.  This will turn it back on.
-ENABLE_FILE_INJECTION=${ENABLE_FILE_INJECTION:-False}
+ENABLE_FILE_INJECTION=$(trueorfalse False ENABLE_FILE_INJECTION)
 
 
 # Entry Points
@@ -60,7 +60,6 @@
         iniset $NOVA_CONF DEFAULT vnc_enabled "false"
     fi
 
-    ENABLE_FILE_INJECTION=$(trueorfalse False ENABLE_FILE_INJECTION)
     if [[ "$ENABLE_FILE_INJECTION" = "True" ]] ; then
         # When libguestfs is available for file injection, enable using
         # libguestfs to inspect the image and figure out the proper
@@ -97,6 +96,14 @@
             yum_install libcgroup-tools
         fi
     fi
+
+    if [[ "$ENABLE_FILE_INJECTION" = "True" ]] ; then
+        if is_ubuntu; then
+            install_package python-guestfs
+        elif is_fedora || is_suse; then
+            install_package python-libguestfs
+        fi
+    fi
 }
 
 # start_nova_hypervisor - Start any required external services