➜ xmonad-log-applet git:(master) ✗ sudo apt-cache search "libxfce4panel*"
libxfce4panel-2.0-4 - Xfce4 panel libraries (GTK3 variant)
libxfce4panel-2.0-dev - Xfce4 panel libraries (GTK3 variant)
configure: error: Package requirements (libxfce4panel-1.0 >= 4.6.0) were not met:
No package 'libxfce4panel-1.0' found
➜ xmonad-log-applet git:(master) ✗ uname -a
Linux *** 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
➜ xmonad-log-applet git:(master) ✗ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=15.10
DISTRIB_CODENAME=wily
DISTRIB_DESCRIPTION="Ubuntu 15.10"