--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,7 @@
 all: bchunk
 
 # For systems with GCC (Linux, and others with GCC installed):
-CC = gcc
-LD = gcc
+CC ?= gcc
 CFLAGS = -Wall -Wstrict-prototypes -O2
 
 # For systems with a legacy CC:
@@ -11,10 +10,10 @@ CFLAGS = -Wall -Wstrict-prototypes -O2
 #CFLAGS = -O
 
 # For BSD install: Which install to use and where to put the files
-INSTALL = install
-PREFIX  = /usr/local
-BIN_DIR = $(PREFIX)/bin
-MAN_DIR = $(PREFIX)/man
+INSTALL ?= install
+PREFIX  ?= /usr/local
+BIN_DIR ?= $(PREFIX)/bin
+MAN_DIR ?= $(PREFIX)/man
 
 .c.o:
 	$(CC) $(CFLAGS) -c $<
@@ -26,14 +25,14 @@ distclean: clean
 
 install: installbin installman
 installbin:
-	$(INSTALL) -m 755 -s -o root -g root bchunk		$(BIN_DIR)
+	$(INSTALL) -Dm 755 bchunk   -t $(BIN_DIR)
 installman:
-	$(INSTALL) -m 644 -o bin -g bin bchunk.1	 	$(MAN_DIR)/man1
+	$(INSTALL) -Dm 644 bchunk.1	-t $(MAN_DIR)/man1
 
 BITS = bchunk.o
 
 bchunk: $(BITS)
-	$(LD) $(LDFLAGS) -o bchunk $(BITS)
+	$(CC) $(LDFLAGS) -o bchunk $(BITS)
 
 bchunk.o:	bchunk.c