diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..c54b63d
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,21 @@
+{
+  mkShellNoCC,
+  git,
+  writeShellApplication,
+}:
+mkShellNoCC {
+  name = "nichts";
+
+  DIRENV_LOG_FORMAT = "";
+
+  packages = [
+    git # take a guess
+
+    (writeShellApplication {
+      name = "update";
+      text = ''
+        nix flake update && git commit flake.lock -m "flake: bump inputs"
+      '';
+    })
+  ];
+}