diff --git a/scripts/vite/src/paths.ts b/scripts/vite/src/paths.ts
index a07f6b54..5bd44a0d 100644
--- a/scripts/vite/src/paths.ts
+++ b/scripts/vite/src/paths.ts
@@ -1,5 +1,5 @@
 import { fileURLToPath } from 'url';
-import { resolve, dirname } from 'path';
+import { resolve, dirname, relative } from 'path';
 import { cwd } from 'process';
 
 function createPaths() {
@@ -22,7 +22,13 @@ function createPaths() {
     proxySetup: resolve(user, 'service-worker.js'),
 
     // Paths relative to the source directory
-    entry: resolve(source, 'main.ts'),
+    /*
+    When this is an absolute path, on windows it will be loaded as `file://c:/...`.
+    Instead it would ideally be loaded as `/c:/...` as a valid "url".
+    However, if we make it relative like `src/main.ts`, it will work on both systems.
+    This path is inserted into the index.html, so we need to make it relative.
+    */
+    entry: relative(paths.user, resolve(source, 'main.ts')),
 
     serviceWorker: resolve(source, 'service-worker.ts'),
   };