diff --git a/ocaml/Makefile.am b/ocaml/Makefile.am
index ea4137755..ec190e465 100644
--- a/ocaml/Makefile.am
+++ b/ocaml/Makefile.am
@@ -190,7 +190,9 @@ depend: .depend
 
 SUFFIXES = .cmo .cmi .cmx .ml .mli .mll .mly
 
-# Do the installation by hand, because we want to run ocamlfind.
+# Run ocamlfind to perform the install.  ocamlfind refuses to install
+# the package if it is already installed, so remove the old package
+# first.
 data_hook_files = META *.so *.a *.cma *.cmi $(srcdir)/*.mli
 if HAVE_OCAMLOPT
 data_hook_files += *.cmx *.cmxa
@@ -199,6 +201,8 @@ endif
 install-data-hook:
 	mkdir -p $(DESTDIR)$(OCAMLLIB)
 	mkdir -p $(DESTDIR)$(OCAMLLIB)/stublibs
+	rm -rf $(DESTDIR)$(OCAMLLIB)/guestfs
+	rm -rf $(DESTDIR)$(OCAMLLIB)/stublibs/dllmlguestfs.so*
 	$(OCAMLFIND) install \
 	  -ldconf ignore -destdir $(DESTDIR)$(OCAMLLIB) \
 	  guestfs \
diff --git a/v2v/test-harness/Makefile.am b/v2v/test-harness/Makefile.am
index c0723fd00..7bba68908 100644
--- a/v2v/test-harness/Makefile.am
+++ b/v2v/test-harness/Makefile.am
@@ -100,7 +100,9 @@ endif
 
 v2v_test_harness.cmi: $(top_builddir)/ocaml/guestfs.cmi
 
-# Do the installation by hand, because we want to run ocamlfind.
+# Run ocamlfind to perform the install.  ocamlfind refuses to install
+# the package if it is already installed, so remove the old package
+# first.
 data_hook_files = META *.so *.a *.cmi $(srcdir)/*.mli
 if !HAVE_OCAMLOPT
 data_hook_files += *.cmo *.cma
@@ -111,6 +113,8 @@ endif
 install-data-hook:
 	mkdir -p $(DESTDIR)$(OCAMLLIB)
 	mkdir -p $(DESTDIR)$(OCAMLLIB)/stublibs
+	rm -rf $(DESTDIR)$(OCAMLLIB)/v2v_test_harness
+	rm -rf $(DESTDIR)$(OCAMLLIB)/stublibs/dllv2v_test_harness.so*
 	$(OCAMLFIND) install \
 	  -ldconf ignore -destdir $(DESTDIR)$(OCAMLLIB) \
 	  v2v_test_harness \