Make sure everything has been built before trying to install it.
--- Makefile.in.orig	2001-10-30 12:31:09.000000000 -0600
+++ Makefile.in	2022-03-19 22:25:27.000000000 -0500
@@ -80,7 +80,7 @@
 gtk.o: gtk.c
 	$(CC) $(ALL_CFLAGS) $(GTK_CFLAGS) $(IMAGE_DEFINES) -c $< -o $@
 
-install:
+install: all
 	$(MKINSTALLDIRS) ${DESTDIR}${bindir}
 	$(INSTALL) ${PROG} ${DESTDIR}${bindir}/${PROG}
 	$(MKINSTALLDIRS) ${DESTDIR}${mandir}/${MANDIR}