diff --git a/vendorsetup.sh b/vendorsetup.sh
index a689f1e78ec747ee537187b39b897cb63a59491a..c0b8e22000ac5972f7503095f8abfd46b92db4b4 100644
--- a/vendorsetup.sh
+++ b/vendorsetup.sh
@@ -281,14 +281,10 @@ else
    esac
 fi
 
-# Use a local xulrunner SDK if present instead of downloading a new copy
-if [[ -d gaia/xulrunner-sdk/.git ]]; then
+# Use a local B2G SDK if present instead of downloading a new copy
+if [[ -d prebuilts/b2g_sdk/$(uname)/.git ]]; then
    export USE_LOCAL_XULRUNNER_SDK=1
-   export XULRUNNER_DIRECTORY="$(gettop)/gaia/xulrunner-sdk"
-
-elif [[ -d gaia/xulrunner-sdk-$(uname)/.git ]]; then
-   export USE_LOCAL_XULRUNNER_SDK=1
-   export XULRUNNER_DIRECTORY="$(gettop)/gaia/xulrunner-sdk-$(uname)"
+   export XULRUNNER_DIRECTORY="$(gettop)/prebuilts/b2g_sdk/$(uname)"
 fi
 
 # Don't build sources.xml