+arch_lucid="${arch_karmic}"
+arch_lucid_updates="${arch_lucid}"
+arch_lucid_backports="${arch_lucid}"
+arch_maverick="${arch_lucid}"
+arch_maverick_updates="${arch_maverick}"
+arch_maverick_backports="${arch_maverick}"
+arch_natty="${arch_maverick}"
+arch_natty_updates="${arch_natty}"
+arch_natty_backports="${arch_natty}"