It needs to be rebuilt with the new Boost 1.60.0 package. Before gcc-6.0.0 arrived in rawhide it failed to build because it depends on libsigc++ which now requires C++11, but gcc-6 defaults to C++14 so that is resolved, and it fails with this error instead: actions.cc: In constructor 'TreeViewMulti::TreeViewMulti()': actions.cc:57:39: error: 'group' is not a member of 'sigc' get_selection()->set_select_function(sigc::group(&negate, sigc::ref(pending))); ^~~~
Fixed in rawhide.