diff --git a/docs/build.rst b/docs/build.rst
index a3a16ce32..33c19574d 100644
--- a/docs/build.rst
+++ b/docs/build.rst
@@ -81,11 +81,13 @@ you might have to rebuild the app.
 Build and run from source with Nix
 -------------------------------------------
 
-On NixOS or any other Linux or macOS system with the Nix package manager installed,
-execute ``./nix-shell`` to create the correct environment to build kitty or use
-``./nix-shell --pure`` instead to eliminate most of the influence of the outside system,
-e.g. globally installed packages. ``nix-shell`` will automatically fetch all required
-dependencies and make them available in the newly spawned shell.
+On NixOS or any other Linux or macOS system with the Nix package manager
+installed, execute `nix-shell
+<https://nixos.org/guides/nix-pills/developing-with-nix-shell.html>`_ to create
+the correct environment to build kitty or use ``nix-shell --pure`` instead to
+eliminate most of the influence of the outside system, e.g. globally installed
+packages. ``nix-shell`` will automatically fetch all required dependencies and
+make them available in the newly spawned shell.
 
 Then proceed with ``make`` or ``make app`` according to the platform specific instructions above.