--- mozilla-2.0/xulrunner/installer/libxul-embedding.pc.in	2011-03-04 00:12:04.000000000 +0200
+++ mozilla-2.0/xulrunner/installer/libxul-embedding.pc.in.new	2011-03-18 23:18:30.650463070 +0200
@@ -6,5 +6,6 @@
 Name: libxul-embedding
 Description: Static library for version-independent embedding of the Mozilla runtime
 Version: %MOZILLA_VERSION%
+Requires: %NSPR_NAME% >= %NSPR_VERSION%
 Libs: -L${sdkdir}/lib -lxpcomglue -ldl
 Cflags: -DXPCOM_GLUE -I${includedir} %WCHAR_CFLAGS%