xfce4-notifyd error

checking for libnotify >= 0.7.0... found, but 0.5.2
*** The required package libnotify was found on your system,
*** but the installed version (0.5.2) is too old.
*** Please upgrade libnotify to atleast version 0.7.0, or adjust
*** the PKG_CONFIG_PATH environment variable if you installed
*** the new version of the package in a nonstandard prefix so
*** pkg-config is able to find it.
Creating /var/log/lunar/compile/xfce4-notifyd-0.2.4.xz
! Problem detected during BUILD