diff --git a/app/mac/mozconfig b/app/mac/mozconfig
index 9d22089430..ae0e61c531 100644
--- a/app/mac/mozconfig
+++ b/app/mac/mozconfig
@@ -4,7 +4,7 @@ elif [ "$Z_ARCH" == "aarch64" ]; then
         ac_add_options --target=aarch64-apple-darwin
 fi
 ac_add_options --enable-bootstrap
-ac_add_options --with-macos-sdk=$HOME/tmp/MacOSX15.5.sdk
+ac_add_options --with-macos-sdk=$HOME/src/MacOSX15.5.sdk
 
 mk_add_options AUTOCLOBBER=1
 
@@ -24,6 +24,11 @@ export MOZILLA_OFFICIAL=1
 export RELEASE_OR_BETA=1
 MOZ_REQUIRE_SIGNING=
 
+# Official builds require source info, which Mozilla only detects automatically from
+# Mercurial checkouts
+export MOZ_SOURCE_REPO=https://github.com/mozilla-firefox/firefox
+export MOZ_SOURCE_CHANGESET=$(git -C "$topsrcdir" rev-parse HEAD)
+
 ac_add_options --enable-official-branding
 
 # Build updater without MAR signature verification