diff --git a/flake.nix b/flake.nix
index 7044574..6f99e30 100644
--- a/flake.nix
+++ b/flake.nix
@@ -49,6 +49,8 @@
             cabal-install
             nodePackages.prettier
             python3
+            # mogrify -strip to strip images
+            imagemagick
           ];
         };
         devShell = self.devShells.${system}.default;
diff --git a/images/nix-install.png b/images/nix-install.png
index 2cabdd3..68f9d66 100644
Binary files a/images/nix-install.png and b/images/nix-install.png differ