diff -up xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul-embedding.pc.in.pk xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul-embedding.pc.in
--- xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul-embedding.pc.in.pk	2010-08-06 03:09:24.000000000 +0200
+++ xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul-embedding.pc.in	2010-08-16 11:12:32.000000000 +0200
@@ -6,5 +6,6 @@ idldir=%idldir%
 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%
diff -up xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul.pc.in.pk xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul.pc.in
--- xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul.pc.in.pk	2010-08-06 03:09:24.000000000 +0200
+++ xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/libxul.pc.in	2010-08-16 11:07:52.000000000 +0200
@@ -2,6 +2,7 @@ prefix=%prefix%
 sdkdir=%sdkdir%
 includedir=%includedir%
 idldir=%idldir%
+libdir=%libdir%
 
 Name: libxul
 Description: The Mozilla Runtime and Embedding Engine
diff -up xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/Makefile.in.pk xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/Makefile.in
--- xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/Makefile.in.pk	2010-08-16 11:07:52.000000000 +0200
+++ xulrunner-1.9.3.0/mozilla-central/xulrunner/installer/Makefile.in	2010-08-16 11:07:52.000000000 +0200
@@ -116,6 +116,7 @@ endif
 	-e "s|%includedir%|$(includedir)|" \
 	-e "s|%idldir%|$(idldir)|" \
 	-e "s|%sdkdir%|$(sdkdir)|" \
+	-e "s|%libdir%|$(installdir)|" \
 	-e "s|%MOZ_APP_NAME%|$(MOZ_APP_NAME)|" \
 	-e "s|%MOZILLA_VERSION%|$(MOZ_APP_VERSION)|" \
 	-e "s|%WCHAR_CFLAGS%|$(WCHAR_CFLAGS)|" \