+AC_CHECK_OCAML_PKG([libvirt])
+if test "$OCAML_PKG_libvirt" = "no"; then
+ AC_MSG_ERROR([Please install OCaml module 'libvirt'.])
+fi
+
+AC_CHECK_OCAML_PKG([guestfs])
+if test "$OCAML_PKG_guestfs" = "no"; then
+ AC_MSG_ERROR([Please install OCaml module 'guestfs'.])
+fi
+
+AC_CHECK_OCAML_PKG([xml-light])
+if test "$OCAML_PKG_xml_light" = "no"; then
+ AC_MSG_ERROR([Please install OCaml module 'xml-light'.])
+fi
+
+AC_CHECK_OCAML_PKG([extlib])
+if test "$OCAML_PKG_extlib" = "no"; then
+ AC_MSG_ERROR([Please install OCaml module 'extlib'.])
+fi
+
+dnl Check for gdk_pixbuf_mlsource program.
+AC_PATH_PROGS([GDK_PIXBUF_MLSOURCE], [gdk_pixbuf_mlsource])
+