--- src/mesa/Makefile.orig	2011-08-04 10:47:51.000000000 +0200
+++ src/mesa/Makefile	2011-08-04 10:48:17.000000000 +0200
@@ -191,10 +191,10 @@
 
 install-osmesa: default osmesa.pc
 	$(INSTALL) -d $(DESTDIR)$(INSTALL_LIB_DIR)
-	$(INSTALL) -d $(DESTDIR)$(INSTALL_LIB_DIR)/pkgconfig
+	$(INSTALL) -d $(DESTDIR)$(prefix)/libdata/pkgconfig
 	$(MINSTALL) $(TOP)/$(LIB_DIR)/$(OSMESA_LIB_GLOB) \
 		$(DESTDIR)$(INSTALL_LIB_DIR)
-	$(INSTALL) -m 644 osmesa.pc $(DESTDIR)$(INSTALL_LIB_DIR)/pkgconfig
+	$(INSTALL) -m 644 osmesa.pc $(DESTDIR)$(prefix)/libdata/pkgconfig
 
 install-dri: default
 	cd drivers/dri && $(MAKE) install
