--- ../Makefile.orig	2020-05-09 17:15:03.947271379 +0200
+++ ./Makefile	2020-05-09 17:16:08.437076432 +0200
@@ -1,10 +1,12 @@
-CC=gcc
-FLAGS=-O2 -o gnuski
-LIBS=-lncurses
+CC ?= gcc
+LIBS = -lncurses
 FILES=main.c objects.c
 
 all:
-	$(CC) $(FLAGS) $(FILES) $(LIBS)
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(FILES) $(LIBS) -o gnuski
 
 clean:
 	rm *~ gnuski
+
+install:
+	install -Dm700 gnuski $(PREFIX)/bin/