Add shell.nix

flake.nix

@@ -64,5 +64,8 @@
 
       nixosConfigurations =
         mapHosts ./hosts { inherit system; };
+
+      devShell."${system}" =
+        import ./shell.nix { inherit pkgs; };
     };
 }

shell.nix

@@ -0,0 +1,18 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+with pkgs;
+let nixBin =
+      writeShellScriptBin "nix" ''
+          ${nixFlakes}/bin/nix --option experimental-features "nix-command flakes" "$@"
+      '';
+in mkShell {
+  buildInputs = [
+    git
+    gnupg
+    nix-zsh-completions
+  ];
+  shellHook = ''
+    export DOTFILES="$(pwd)"
+    export PATH="$DOTFILES/bin:${nixBin}/bin:$PATH"
+  '';
+}