Install nix-diff

home-manager/roles/default.nix

@@ -146,6 +146,7 @@
           magic-wormhole
           alejandra
           nix-top
+          nix-diff
           matrix-commander
           upterm
           lazygit

nixos/roles/laminar/test-config.nix

@@ -86,7 +86,7 @@ in {
                 Left (_ :: Exception.IOException) -> say msg >> exitSuccess
                 Right value -> pure value
 
-            git arg = exe "/run/wrappers/bin/sudo" "-u" "${user}" "git" arg |> captureTrim
+            git arg = exe "/run/wrappers/bin/sudo" "-u" "${user}" "${lib.getExe pkgs.git}" arg |> captureTrim
 
             main = do
               cd "/etc/nixos"

overlays/previews.nix

@@ -13,5 +13,6 @@ self: super: {
     helix # until 23.05: Various features
     headscale # until 23.05: Required for correct hostnames and Android compat
     lklWithFirewall # until 23.05: To Fix firewall checks
+    nix-diff
     ;
 }