--- a/Makefile.in
+++ b/Makefile.in
@@ -55,7 +55,7 @@ manext = 3
 .c.lo:
 	$(LIBTOOL) --mode=compile $(CC) -c $(CPPFLAGS) $(DEFS) -I. -I$(srcdir) $(CFLAGS) $<
 
-SHELL = /bin/sh
+SHELL = @SHELL@
 
 PROGS = libgdbm.la testgdbm testdbm testndbm tndbm tdbm conv2gdbm
 
@@ -130,7 +130,7 @@ install: libgdbm.la gdbm.h gdbm.info
 	$(srcdir)/mkinstalldirs $(INSTALL_ROOT)$(libdir) \
 		$(INSTALL_ROOT)$(includedir) $(INSTALL_ROOT)$(man3dir) \
 		$(INSTALL_ROOT)$(infodir)
-	$(LIBTOOL) $(INSTALL) -c libgdbm.la $(INSTALL_ROOT)$(libdir)/libgdbm.la
+	$(LIBTOOL) --mode=install $(INSTALL) -c libgdbm.la $(INSTALL_ROOT)$(libdir)/libgdbm.la
 	$(INSTALL_DATA) -o $(BINOWN) -g $(BINGRP) gdbm.h \
 		$(INSTALL_ROOT)$(includedir)/gdbm.h
 	$(INSTALL_DATA) -o $(BINOWN) -g $(BINGRP) $(srcdir)/gdbm.3 \
@@ -141,7 +141,7 @@ install: libgdbm.la gdbm.h gdbm.info
 install-compat:
 	$(srcdir)/mkinstalldirs $(INSTALL_ROOT)$(libdir) \
 		$(INSTALL_ROOT)$(includedir)
-	$(LIBTOOL) $(INSTALL) -c libgdbm_compat.la \
+	$(LIBTOOL) --mode=install $(INSTALL) -c libgdbm_compat.la \
 		$(INSTALL_ROOT)$(libdir)/libgdbm_compat.la
 	$(INSTALL_DATA) -o $(BINOWN) -g $(BINGRP) $(srcdir)/dbm.h \
 		$(INSTALL_ROOT)$(includedir)/dbm.h