Yaourt 0.4.8: Archlinux package manager
endymion@hyperion:~$ yaourt powersave
Yaourt 0.4.8: Archlinux package manager
1) unstable/powersave 0.12.7-1 [installed]
   The powersave package provides global power management tasks. It supports
   battery monitoring, userspace workarounds for proper suspend/standby
   functionality and more.
2) aur/kpowersave 0.6.2-3
   for the powersave daemon

==>  Enter the number(s) to install package(s)
==>  ----------------------------------------------
==> 0
sed: -e expression #1, char 2: invalid usage of line address 0
Yaourt 0.4.8: Archlinux package manager