Hi Jakob, I am not sure that I understand the problem: Starting with a fresh system:
root@sid:~# LANG=C dpkg -l "*pappl*"|grep pappl dpkg-query: no packages found matching *pappl* root@sid:~# LANG=C dpkg -l "*avahi*"|grep avahi un avahi-autoipd <none> <none> (no description available) un avahi-daemon <none> <none> (no description available) results in: root@sid:~# pkg-config --exists pappl; echo $? 1 Ok, now installing libpappl-dev root@sid:~# LANG=C apt-get install libpappl-dev Reading package lists... Done Building dependency tree... Done Reading state information... Done The following additional packages will be installed: libavahi-client3 libavahi-common-data libavahi-common3 libcups2 libcups2-dev libcupsfilters-dev libcupsfilters1 libcupsimage2 (...) you can see all needed avahi packages will be installed and afterwards: root@sid:~# pkg-config --exists pappl; echo $? 0 Isn't this the result you wanted? Thorsten
