diff -r 868efce3aac9 Makefile
--- a/Makefile	Fri Feb 25 14:06:44 2011 +0100
+++ b/Makefile	Mon Feb 28 12:41:30 2011 +0100
@@ -31,7 +31,7 @@
 unexport AR CC CFLAGS C_INCLUDE_PATH CPATH CPLUS_INCLUDE_PATH CPP
 unexport CPPFLAGS CROSS CXX CXXCPP CXXFLAGS EXEEXT EXTRA_CFLAGS
 unexport EXTRA_LDFLAGS LD LDFLAGS LIBRARY_PATH LIBS NM
-unexport OBJC_INCLUDE_PATH PKG_CONFIG QMAKESPEC RANLIB STRIP
+unexport OBJC_INCLUDE_PATH PKG_CONFIG PKG_CONFIG_PATH QMAKESPEC RANLIB STRIP
 
 SHORT_PKG_VERSION = \
     $(word 1,$(subst ., ,$($(1)_VERSION))).$(word 2,$(subst ., ,$($(1)_VERSION)))