diff -r 000000000000 -r 6474c204b198 b2g/config/mozconfigs/win32_gecko/nightly
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/b2g/config/mozconfigs/win32_gecko/nightly	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+. "$topsrcdir/b2g/config/mozconfigs/common"
+
+ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
+ac_add_options --enable-update-packaging
+ac_add_options --enable-jemalloc
+ac_add_options --enable-signmar
+
+# Nightlies only since this has a cost in performance
+ac_add_options --enable-js-diagnostics
+
+# Needed to enable breakpad in application.ini
+export MOZILLA_OFFICIAL=1
+
+export MOZ_TELEMETRY_REPORTING=1
+
+if test "$PROCESSOR_ARCHITECTURE" = "AMD64" -o "$PROCESSOR_ARCHITEW6432" = "AMD64"; then
+  . $topsrcdir/build/win32/mozconfig.vs2010-win64
+else
+  . $topsrcdir/build/win32/mozconfig.vs2010
+fi
+
+# B2G Options
+ac_add_options --enable-application=b2g
+export CXXFLAGS=-DMOZ_ENABLE_JS_DUMP
+
+GAIADIR=$topsrcdir/gaia
+
+# Build simulator xpi and phone tweaks for b2g-desktop
+FXOS_SIMULATOR=1
+
+. "$topsrcdir/b2g/config/mozconfigs/common.override"