--- Makefile.orig	2014-04-06 11:34:47 UTC
+++ Makefile
@@ -1,6 +1,6 @@
-CFLAGS = -O3 -Wall -Wextra --std=c99 `pkg-config --cflags argtable2 sndfile lilv-0`
-LDLIBS = `pkg-config --libs argtable2 sndfile lilv-0` -lm
-BINDIR = $(DESTDIR)/usr/bin
+CFLAGS += -Wall -Wextra --std=c99 `pkg-config --cflags argtable2 sndfile lilv-0`
+LDLIBS += `pkg-config --libs argtable2 sndfile lilv-0` -lm
+BINDIR = $(DESTDIR)/$(PREFIX)/bin
 INSTALL_PROGRAM = install
 
 all: lv2file