diff --git a/src/Makefile b/src/Makefile
index b8957e3..4c2646c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -5,7 +5,7 @@ CRYPTO = mbedtls/sha256.c mbedtls/md.c mbedtls/md_wrap.c
 SOURCE = $(TARGET).c random_r.c $(CRYPTO)
 LIBS   = -lpthread
 
-PREFIX ?= $(DESTDIR)/usr
+PREFIX ?= /usr
 BINDIR = $(PREFIX)/bin
 
 all:
@@ -15,12 +15,11 @@ debug:
 	$(CC) $(CLFAGS) $(CPPFLAGS) -DDEBUG -o $(TARGET) $(SOURCE) $(LIBS) $(LDFLAGS)
 
 install:
-	rm -f $(BINDIR)/$(TARGET)
 	install -d $(BINDIR)
-	install -m 755 $(TARGET) $(BINDIR)
+	install -m 755 $(TARGET) $(DESTDIR)$(BINDIR)
 
 uninstall:
-	rm -f $(BINDIR)/$(TARGET)
+	rm -f $(DESTDIR)$(BINDIR)/$(TARGET)
 
 clean:
 	rm -f $(TARGET)