+arch_natty="${arch_maverick}"
+arch_natty_updates="${arch_natty}"
+arch_natty_backports="${arch_natty}"
+arch_oneiric="${arch_maverick}"
+arch_oneiric_updates="${arch_oneiric}"
+arch_oneiric_backports="${arch_oneiric}"
+arch_precise="${arch_oneiric}"
+arch_precise_updates="${arch_precise}"
+arch_precise_backports="${arch_precise}"