diff --git a/flake.nix b/flake.nix
index ca7c684..d143495 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,7 +21,7 @@
             version = "0.1.0";
             src = ./.;
 
-            vendorHash = "";
+            vendorHash = "sha256-NbAa4QM/TI3BTuZs4glx9k3ZjSl2/2LQfKlQ7izR8Ho=";
             # Run: nix build .#packages.x86_64-linux.default
             # It will fail with the correct hash. Replace it here.
 
@@ -30,6 +30,9 @@
 
             nativeCheckInputs = with pkgs; [ ];
 
+            # Tests require network; they run in CI instead.
+            checkPhase = "";
+
             meta = with pkgs.lib; {
               description = "Privacy-respecting, open metasearch engine";
               homepage = "https://git.ashisgreat.xyz/penal-colony/kafka";