--- scripts/libpng.pc.in.orig	2009-12-03 02:46:02.000000000 +0100
+++ scripts/libpng.pc.in	2010-01-12 13:49:36.000000000 +0100
@@ -1,10 +1,10 @@
-prefix=@prefix@
-exec_prefix=@exec_prefix@
-libdir=@libdir@
-includedir=@includedir@/libpng12
+prefix=@PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
 
 Name: libpng
 Description: Loads and saves PNG files
 Version: 1.2.43
-Libs: -L${libdir} -lpng12
+Libs: -L${libdir} -lpng -lz -lm
 Cflags: -I${includedir}