diff --git a/data/Makefile b/data/Makefile
index 387e3bd..95b0c4b 100644
--- a/data/Makefile
+++ b/data/Makefile
@@ -14,6 +14,7 @@ cpp.pc: cpp.pc.in ../config.sh
 
 clean:
 	$(RM) -- $(cpp.pc_OBJS)
+	./pkgconfig.sh -c -P "$(PREFIX)" -- "cpp.pc"
 
 distclean: clean
 	$(RM) -- $(TARGETS)
diff --git a/doc/Makefile b/doc/Makefile
index e4f11fc..a111eb5 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -28,10 +28,12 @@ gtkdoc/html.stamp: gtkdoc/CPP-docs.xml gtkdoc/sgml.stamp
 clean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) clean) || exit; done
 	$(RM) -- $(gtkdoc/CPP.types_OBJS) $(gtkdoc/tmpl.stamp_OBJS) $(gtkdoc/sgml.stamp_OBJS) $(gtkdoc/html.stamp_OBJS)
+	./gtkdoc.sh -c -P "$(PREFIX)" -- "gtkdoc/html.stamp"
 
 distclean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) distclean) || exit; done
 	$(RM) -- $(gtkdoc/CPP.types_OBJS) $(gtkdoc/tmpl.stamp_OBJS) $(gtkdoc/sgml.stamp_OBJS) $(gtkdoc/html.stamp_OBJS)
+	./gtkdoc.sh -c -P "$(PREFIX)" -- "gtkdoc/html.stamp"
 	$(RM) -- $(TARGETS)
 
 install: $(TARGETS)