--- src/Makefile.in.orig	2012-02-24 14:45:27.000000000 +0400
+++ src/Makefile.in	2014-05-18 22:49:46.000000000 +0400
@@ -4,9 +4,7 @@
 VERSION = @MSP430LIBC_VERSION@
 
 # installation prefix (set this if you don't install by hand)
-ifndef PREFIX
 PREFIX = @MSP430LIBC_PREFIX@
-endif
 
 # name of target architecture (used for conform naming)