Hi Chris, The sigc++/class_slot.h include was removed from upstream GParted with the following bug report and commit:
Bug 756035 - GParted does not compile with newer gtkmm libraries in Fedora 23 https://bugzilla.gnome.org/show_bug.cgi?id=756035 Stop including removed <sigc++/class_slot.h> header (#756035) https://git.gnome.org/browse/gparted/commit/?id=d925bd2bb592160bd9b760c200fbeb7c9d24b2a1 Thanks goes to Mike Fleetwood for identifying and fixing this problem. The enhancement was included in the upstream GParted 0.24.0 release on October 27, 2015. Phillip Susi has begun the process of packaging GParted 0.24.0. See: https://packages.qa.debian.org/g/gparted.html Hence I believe that this problem will be resolved when the new version of GParted is accepted into Debian. Regards, Curtis