diff --git a/abstractions/Makefile b/abstractions/Makefile
index c1ad71c727ad7973479f8509193239a5b4754dd0..75563302600780f94c2167e09438fd3b3e4b7e85 100644
--- a/abstractions/Makefile
+++ b/abstractions/Makefile
@@ -111,6 +111,23 @@ la-kitchen_install:
 #	install -d $(DESTDIR)$(manualsdir)/$(LA-KITCHEN_NAME)
 #	install -p $(abstractions_src)/La-kitchen/doc/*.* \
 #		 $(DESTDIR)$(manualsdir)/$(LA-KITCHEN_NAME)
+	# Remove abstractions that are already in mapping.
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/amplitude_n.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/amplitude_n-help.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/debounce.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/debounce-help.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/last_n.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/last_n-help.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/max_n.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/max_n-help.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/median_3.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/median_3-help.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/median_5.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/median_5-help.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/median_7.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/median_7-help.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/min_n.pd
+	rm $(DESTDIR)$(objectsdir)/$(LA-KITCHEN-NAME)/min_n-help.pd
 	install -p $(abstractions_src)/La-kitchen/readme.txt \
 		$(DESTDIR)$(objectsdir)/$(LA_KITCHEN_NAME)/README.txt