diff -r -u -N since-1.1/Makefile since-1.1-makefile/Makefile
--- since-1.1/Makefile	2010-07-10 14:57:32.000000000 +0200
+++ since-1.1-makefile/Makefile	2018-08-28 02:27:47.326549381 +0200
@@ -12,14 +12,14 @@
 
 CC = gcc
 RM = rm -f
-INSTALL = install -D
+INSTALL = install
 
 $(NAME): $(NAME).c
 	$(CC) $(CFLAGS) -o $@ $^
 
 install: $(NAME)
-	$(INSTALL) $(NAME) $(prefix)/bin/$(NAME)
-	$(INSTALL) $(NAME).1 $(prefix)/share/man/man1/$(NAME).1
+	$(INSTALL) -Dm755 $(NAME) $(prefix)/bin/$(NAME)
+	$(INSTALL) -Dm644 $(NAME).1 $(prefix)/share/man/man1/$(NAME).1
 
 clean: 
 	$(RM) $(NAME) core *.o