Don't remove udev on jessie containers as this tries to remove systemd, which fails

packages.ia

@@ -70,7 +70,7 @@ if @machine {
 
 # container (virtual server)
 if @container {
-    remove udev initramfs-tools pm-utils radeontool acpid ntp;
+    remove initramfs-tools pm-utils radeontool acpid ntp @!jessie udev;
 };
 
 if @auth-core {
@@ -476,7 +476,7 @@ if @X {
     # office
     install scribus gimp xfig dia inkscape;
     install libreoffice/openoffice.org;
-            
+
     # messaging
     install pidgin pidgin-otr empathy;