diff --git a/flake.nix b/flake.nix
index db88978..0e7d4e7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -32,7 +32,8 @@
             pname = "sift";
             inherit version;
             src = ./.;
-            vendorHash = "sha256-byOhTmZTW76qEyv8PyuCtbj2C+nk894nPyuwjhFJqtk=";
+            # vendor/ is committed; a non-null hash makes buildGoModule refuse the tree.
+            vendorHash = null;
             env.CGO_ENABLED = "0";
             ldflags = ldflags;
             subPackages = [ "cmd/sift" ];