diff --git a/.env b/.env
deleted file mode 100644
index 209dfaf..0000000
--- a/.env
+++ /dev/null
@@ -1 +0,0 @@
-PUBLIC_PROXY_PATH=
\ No newline at end of file
diff --git a/src/app.d.ts b/src/app.d.ts
index e063b0e..c8086d8 100644
--- a/src/app.d.ts
+++ b/src/app.d.ts
@@ -16,6 +16,7 @@ declare global {
     // interface Platform {}
   }
   declare const __APP_VERSION__: string;
+  declare const __PROXYURL__: string;
 }
 
 export {};
diff --git a/src/lib/urlloader.ts b/src/lib/urlloader.ts
index 9a50cc1..0d32423 100644
--- a/src/lib/urlloader.ts
+++ b/src/lib/urlloader.ts
@@ -1,6 +1,7 @@
 import { appStore } from "$lib/store";
 import { convertToDocModel } from "$lib/singleview/docmodel/docmodel";
-import { PUBLIC_PROXY_PATH } from "$env/static/public";
+/*global __PROXYURL__*/
+const PUBLIC_PROXY_PATH: string = __PROXYURL__;
 
 /**
  * loadSingleCSAF loads a single CSAF document.
diff --git a/vite.config.ts b/vite.config.ts
index eb10d7b..2c287ef 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -15,6 +15,7 @@ import { fileURLToPath } from "url";
 const file = fileURLToPath(new URL("package.json", import.meta.url));
 const json = readFileSync(file, "utf8");
 const pkg = JSON.parse(json);
+const dev = process.argv.includes("dev");
 
 export default defineConfig({
   server: {
@@ -39,6 +40,7 @@ export default defineConfig({
     }
   },
   define: {
-    __APP_VERSION__: `${JSON.stringify(pkg.version)}`
+    __APP_VERSION__: `${JSON.stringify(pkg.version)}`,
+    __PROXYURL__: dev ? "/proxy/" : ""
   }
 });