use newer wand which internally handles this fix

default.nix

@@ -2,7 +2,7 @@
   callPackage,
   wandardFrontUtils ? callPackage (builtins.fetchGit {
     url = https://git.wizbos.club/wizbos-pub/wand-front-utils.git;
-    rev = "c05fd94028d6023b3d4debf0c1d2bece2c547df5";
+    rev = "e0e3b70e78d458e79df069ac654a558de985f162";
   }) {},
   ...
 }:

result

@@ -0,0 +1 @@
+/nix/store/z2sy0d39smcgmpp5wqwny4zvjc2adavn-gen2.space

src/index.js

@@ -1,5 +1,3 @@
-document.body.innerHTML = ''
-
 const { Elm } = require('./Main.elm');
 
 Elm.Main.init({});