diff --git a/third_party/shadow.tar.gz.sha1 b/third_party/shadow.tar.gz.sha1
new file mode 100644
index 0000000..2dfb69e
--- /dev/null
+++ b/third_party/shadow.tar.gz.sha1
@@ -0,0 +1 @@
+2e350b99a72aba5d45b018b0f5391130c8751371
\ No newline at end of file