--- Makefile.orig	2021-11-18 00:25:55 UTC
+++ Makefile
@@ -1,5 +1,5 @@
 NAME=igal2
-PREFIX=/usr/local
+PREFIX?=/usr/local
 BINDIR=$(PREFIX)/bin
 DATADIR=$(PREFIX)/share
 MANDIR=$(DATADIR)/man/man1
@@ -24,13 +24,11 @@ old-clean:
 install:
 	install -d $(DESTDIR)$(BINDIR)
 	install -m 0755 $(NAME) $(DESTDIR)$(BINDIR)
-	ln -si $(NAME) $(DESTDIR)$(BINDIR)/igal
 	install -m 0755 utilities/$(NAME).sh $(DESTDIR)$(BINDIR)
 	install -d $(DESTDIR)$(MANDIR)
 	install -m 0644 $(NAME).1 $(DESTDIR)$(MANDIR)
 	install -d $(DESTDIR)$(IGALDIR)
 	install -m 0644 README ChangeLog COPYING indextemplate2.html slidemovtemplate2.html slidetemplate2.html tile.png $(NAME).css directoryline2.html $(DESTDIR)$(IGALDIR)
-	sed -i 's_/usr/local_$(PREFIX)_' $(DESTDIR)$(BINDIR)/$(NAME) $(DESTDIR)$(BINDIR)/$(NAME).sh $(DESTDIR)$(MANDIR)/$(NAME).1