How do I get a list of installed files from a package?
$ dpkg-query -L fontconfig /. /usr /usr/bin /usr/bin/fc-query /usr/bin/fc-cache /usr/bin/fc-cat [...]
$ apt-file search fontconfig.pc libfontconfig1-dev: usr/lib/pkgconfig/fontconfig.pc libfontconfig1-dev: usr/lib/pkgconfig/fontconfig.pc