diff --git a/users/buffet/default.nix b/users/buffet/default.nix
index 6a2450b..4856419 100644
--- a/users/buffet/default.nix
+++ b/users/buffet/default.nix
@@ -14,6 +14,7 @@
     ./gpg.nix
     ./ime.nix
     ./mako.nix
+    ./nvd.nix
     ./sway.nix
   ];
 
@@ -42,6 +43,7 @@
 
       packages = with pkgs; [
         unstable.anki
+        unstable.logseq
 
         alejandra
         python3
diff --git a/users/buffet/nvd.nix b/users/buffet/nvd.nix
new file mode 100644
index 0000000..aaf4f84
--- /dev/null
+++ b/users/buffet/nvd.nix
@@ -0,0 +1,21 @@
+{pkgs, ...}: {
+  home-manager.users.buffet = {
+    home.packages = [
+      (pkgs.writeScriptBin "nrb" ''
+        #!/usr/bin/env bash
+
+        [[ $UID == 0 ]] || {
+            echo need to run as root
+            exit 1
+        }
+
+        nixos-rebuild build --flake ~buffet/rice#alice || exit 1
+        diff="$(${pkgs.nvd}/bin/nvd diff /run/current-system result)"
+        rm result
+        nixos-rebuild switch --flake ~buffet/rice#alice
+        echo '***'
+        printf '%s' "$diff"
+      '')
+    ];
+  };
+}