diff --git a/PKGBUILD b/PKGBUILD
index ad342be9887d0..3cfd1d4085961 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -107,6 +107,9 @@ _main_package() {
 
 # common functions
 prepare() {
+  export XDG_RUNTIME_DIR="${XDG_RUNTIME_DIR:-$srcdir/xdg}"
+  [ ! -d "$XDG_RUNTIME_DIR" ] && install -dm700 "${XDG_RUNTIME_DIR:?}"
+
   mkdir -p mozbuild
   cd "$_pkgsrc"