diff -ruN nss-3.12.6.orig/nss/coreconf/rules.mk nss-3.12.6/mozilla/security/coreconf/rules.mk
--- nss-3.12.6.orig/nss/coreconf/rules.mk	2009-12-08 01:33:36.000000000 +0000
+++ nss-3.12.6/mozilla/nss/coreconf/rules.mk	2011-04-28 13:59:24.449070011 +0100
@@ -378,7 +378,7 @@
 endif
 
 # The quotes allow absolute paths to contain spaces.
-core_abspath = '$(if $(findstring :,$(1)),$(1),$(if $(filter /%,$(1)),$(1),$(PWD)/$(1)))'
+core_abspath = "$(shell if [ -d $(1) ]; then cd $(1); pwd; else cd `dirname $(1)`; echo `pwd`/`basename $(1)`; fi )"
 
 $(OBJDIR)/$(PROG_PREFIX)%$(OBJ_SUFFIX): %.c
 	@$(MAKE_OBJDIR)