Reformat flake file

flake.nix

@@ -3,7 +3,8 @@
 
   inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
 
-  outputs = { self, nixpkgs }: let
+  outputs = { self, nixpkgs }:
+    let
       system = "x86_64-linux";
 
       pkgs = import nixpkgs { inherit system; };
@@ -16,7 +17,8 @@
         buildInputs = with pkgs; [ vips ];
         dontNpmInstall = true;
       };
-  in {
+    in
+    {
       packages.${system} = {
         angestoepselt-site = pkgs.stdenv.mkDerivation {
           name = "angestoepselt-site";
@@ -40,8 +42,9 @@
         # `nix develop` – see the repository's readme for details – or compiled
         # with `nix build`. The latter will output a folder which contains node
         # and npm binaries that can be used in an IDE.
-      angestoepselt-site-dev = pkgs.runCommand "angestoepselt-site-dev" {
-        buildInputs = [ nodejs pkgs.makeWrapper ];
+        angestoepselt-site-dev = pkgs.symlinkJoin {
+          name = "angestoepselt-site-dev";
+          paths = [ nodejs nodeDependencies ];
 
           shellHook = ''
             export NODE_PATH=${nodeDependencies}/lib/node_modules
@@ -58,23 +61,7 @@
             echo "  changes."
             echo ""
           '';
-      } ''
-        mkdir -p "$out"
-        ln -s "${nodejs}/lib" "$out/lib"
-
-        wrap() {
-          makeWrapper "${nodejs}/bin/$1" "$out/bin/$1" \
-            --prefix PATH : "${nodejs}/bin" \
-            --prefix PATH : "${nodeDependencies}/bin" \
-            --set-default NODE_PATH "${nodeDependencies}/lib/node_modules"
-        }
-
-        wrap node
-        wrap npm
-        wrap npx
-
-        unset -f wrap
-      '';
+        };
       };
 
       defaultPackage.${system} = self.packages.${system}.angestoepselt-site-dev;