use special wand init to fix links

default.nix

@@ -63,6 +63,13 @@ let
         const ROUTES = ${builtins.toJSON routes}
       '' + "\n" + baseWebpackConfig;
       webpackConfigFile = pkgs.writeText "${name}-webpack-config" webpackConfig;
+
+      wandInit = pkgs.writeText "wand.js" ''
+        document.body.innerHTML = '''
+        const sourceTarget = document.createElement('script')
+        sourceTarget.src = '/main.js'
+        document.body.appendChild(sourceTarget)
+      '';
     in
     stdenv.mkDerivation {
       inherit name;
@@ -78,6 +85,7 @@ let
       patchPhase = ''
         ln -sf ${nodeSource}/node_modules .
         cp ${webpackConfigFile} webpack.config.js
+        cp ${wandInit} wand.js
       '';
 
       shellHook = ''

webpack.config.js

@@ -27,7 +27,7 @@ module.exports =
     },
     plugins: [
       new HtmlWebpackPlugin(),
-      new CopyPlugin([{ from: 'data', to: 'data' }]),
+      new CopyPlugin([{ from: 'data', to: 'data' }, { from: 'wand.js', to: 'wand.js' }]),
       new PrerenderSPAPlugin({
         staticDir: path.join(__dirname, 'dist'),
         routes: ROUTES,
@@ -40,9 +40,9 @@ module.exports =
         postProcess(renderedRoute) {
           const dom = new JSDOM(renderedRoute.html, { runScripts: 'outside-only' })
           dom.window.eval(`
-            const sourceTarget = document.createElement('script')
-            sourceTarget.src = '/main.js'
-            document.body.appendChild(sourceTarget)
+            const wandTarget = document.createElement('script')
+            wandTarget.src = '/wand.js'
+            document.body.appendChild(wandTarget)
           `)
           return {
             ...renderedRoute,