Index: Makefile.in
--- Makefile.in.orig
+++ Makefile.in
@@ -19,9 +19,9 @@ pkgdatadir = $(datadir)/@PACKAGE@
 pkglibdir = $(libdir)/@PACKAGE@
 pkgincludedir = $(includedir)/@PACKAGE@
 am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
-install_sh_DATA = $(install_sh) -c -m 644
-install_sh_PROGRAM = $(install_sh) -c
-install_sh_SCRIPT = $(install_sh) -c
+install_sh_DATA = $(BSD_INSTALL_DATA)
+install_sh_PROGRAM = $(BSD_INSTALL_PROGRAM)
+install_sh_SCRIPT = $(BSD_INSTALL_SCRIPT)
 INSTALL_HEADER = $(INSTALL_DATA)
 transform = $(program_transform_name)
 NORMAL_INSTALL = :