-INSTALL = @INSTALL@
-INSTALL_PROGRAM = @INSTALL_PROGRAM@
-INSTALL_DATA = @INSTALL_DATA@
-INSTALL_SCRIPT = @INSTALL_SCRIPT@
+SHTOOL = $(top_srcdir)/build/shtool
+
+INSTALL = $(SHTOOL) install -c
+INSTALL_PROGRAM = $(INSTALL)
+INSTALL_DATA = $(INSTALL) -m 644
+INSTALL_SCRIPT = $(INSTALL)
+
+STRIP = -s