diff --git a/libdivsufsort/lilac.py b/libdivsufsort/lilac.py
index 8c66f58ed6..8a6e65aeba 100644
--- a/libdivsufsort/lilac.py
+++ b/libdivsufsort/lilac.py
@@ -4,6 +4,7 @@ from lilaclib import *
 
 def pre_build():
   update_pkgver_and_pkgrel(_G.newver.lstrip('v'))
+  run_cmd(['updpkgsums'])
 
 def post_build():
   git_add_files('PKGBUILD')