Update preseed.cfg

preseed.cfg

@@ -46,7 +46,11 @@ d-i preseed/late_command string \
 
 # Package selection
 tasksel tasksel/first multiselect standard
-d-i pkgsel/include string build-essential, alice-full
+d-i pkgsel/include string build-essential
+
+d-i preseed/late_command string \
+	in-target apt-get update; \
+	in-target apt-get install -y alice-full;
 
 # Ldap and NFS
 #d-i preseed/late_command string \