diff -up easystroke-0.6.0/actions.cc.lambda easystroke-0.6.0/actions.cc
--- easystroke-0.6.0/actions.cc.lambda	2013-03-27 11:52:38.000000000 -0400
+++ easystroke-0.6.0/actions.cc	2016-02-01 12:04:07.337863849 -0500
@@ -51,10 +51,10 @@ void TreeViewMulti::on_drag_begin(const
 	context->set_icon(pb, pb->get_width(), pb->get_height());
 }
 
-bool negate(bool b) { return !b; }
-
 TreeViewMulti::TreeViewMulti() : Gtk::TreeView(), pending(false) {
-	get_selection()->set_select_function(sigc::group(&negate, sigc::ref(pending)));
+	get_selection()->set_select_function([this](Glib::RefPtr<Gtk::TreeModel> const&, Gtk::TreeModel::Path const&, bool) {
+		return !pending;
+	});
 }
 
 enum Type { COMMAND, KEY, TEXT, SCROLL, IGNORE, BUTTON, MISC };
diff -up easystroke-0.6.0/Makefile.lambda easystroke-0.6.0/Makefile
--- easystroke-0.6.0/Makefile.lambda	2016-02-01 12:05:13.012390968 -0500
+++ easystroke-0.6.0/Makefile	2016-02-01 12:06:06.620004974 -0500
@@ -21,8 +21,7 @@ LOCALEDIR= $(PREFIX)/share/locale
 DFLAGS   =
 OFLAGS   = -O2
 AOFLAGS  = -O3
-STROKEFLAGS  = -Wall -std=c99 $(DFLAGS)
-CXXFLAGS = -Wall $(DFLAGS) -DLOCALEDIR=\"$(LOCALEDIR)\" `pkg-config gtkmm-3.0 dbus-glib-1 --cflags`
+CXXFLAGS = -Wall $(DFLAGS) -std=c++11 -DLOCALEDIR=\"$(LOCALEDIR)\" `pkg-config gtkmm-3.0 dbus-glib-1 --cflags`
 CFLAGS   = -Wall $(DFLAGS) -DLOCALEDIR=\"$(LOCALEDIR)\" `pkg-config gtk+-3.0 --cflags` -DGETTEXT_PACKAGE='"easystroke"'
 LDFLAGS  = $(DFLAGS)
 
@@ -63,7 +62,7 @@ $(BINARY): $(OFILES)
 	$(CXX) $(LDFLAGS) -o $@ $(OFILES) $(LIBS)
 
 stroke.o: stroke.c
-	$(CC) $(STROKEFLAGS) $(AOFLAGS) -MT $@ -MMD -MP -MF $*.Po -o $@ -c $<
+	$(CC) $(CFLAGS) $(AOFLAGS) -MT $@ -MMD -MP -MF $*.Po -o $@ -c $<
 
 %.o: %.c
 	$(CC) $(CFLAGS) $(OFLAGS) -MT $@ -MMD -MP -MF $*.Po -o $@ -c $<