see
    https://github.com/festvox/flite/commit/7e0d98f3e74009dd2d6d0cdd665ca5d8a23453f6
    and
    https://github.com/festvox/flite/commit/c5bd2add37725041c1924132a8a4fd67548fb975

--- main/Makefile.orig	2020-08-12 17:17:09
+++ main/Makefile	2023-04-19 12:40:48
@@ -152,8 +152,8 @@
 	done
 	$(INSTALL) -m 755 $(BINDIR)/flite_time $(DESTDIR)$(INSTALLBINDIR)
 #       The libraries: static and shared (if built)
-	cp -pd $(flite_LIBS_deps) $(DESTDIR)$(INSTALLLIBDIR)
+	cp -r $(flite_LIBS_deps) $(DESTDIR)$(INSTALLLIBDIR)
 ifdef SHFLAGS
-	cp -pd $(SHAREDLIBS) $(VERSIONSHAREDLIBS) $(DESTDIR)$(INSTALLLIBDIR)
+	cp -r $(SHAREDLIBS) $(VERSIONSHAREDLIBS) $(DESTDIR)$(INSTALLLIBDIR)
 endif