diff --git a/bin/gen_build b/bin/gen_build
index e7e0a7f1..5980a08d 100755
--- a/bin/gen_build
+++ b/bin/gen_build
@@ -830,7 +830,7 @@ rule run_application
   description = Run ‘$in’…
 
 rule sign_executable
-  command = codesign -fs "$identity" $in && touch $out
+  command = codesign --timestamp=none -fs "$identity" $in && touch $out
   description = Sign ‘$in’…
 
 rule tbz_archive