--- zpaq-7.15.old/Makefile
+++ zpaq-7.15/Makefile
@@ -1,10 +1,10 @@
 CXX=g++
 CPPFLAGS+=-Dunix
 # CPPFLAGS+=NOJIT
-CXXFLAGS=-O3 -march=native
-PREFIX=/usr/local
+CXXFLAGS?=-O3 -march=native
+PREFIX?=__META_PREFIX__
 BINDIR=$(PREFIX)/bin
-MANDIR=$(PREFIX)/share/man
+MANDIR=$(PREFIX)/man
 
 all: zpaq zpaq.1
 
==== end of patch ====