diff --git a/bootstrap b/bootstrap
index e445af2f2c7e59a45165b5266063b7ca3c81cf23..f34c43dc52f7dc83a613f2b6fc8388cccc01260a 100755
--- a/bootstrap
+++ b/bootstrap
@@ -7,10 +7,9 @@ set -e -x
 top_srcdir="$PWD"
 export top_srcdir
 
-if [ ! -d nix-upstream ]
-then
-    git submodule init
-fi
+git submodule init
 git submodule update
 
+./nix/sync-with-upstream
+
 exec autoreconf -vfi