--- Makefile.in	2025-02-04 20:14:19.000000000 +0800
+++ Makefile.in	2025-04-04 12:07:03.000000000 +0800
@@ -48,7 +48,6 @@
 COPYRIGHT = @COPYRIGHT@
 BYPRODUCTS = makesignum.o makesignum signum.h configm.h *.dSYM
 
-DESTDIR =
 prefix = @prefix@
 exec_prefix = @exec_prefix@
 bindir = @bindir@