diff --git a/ts/svelte/svelte.ts b/ts/svelte/svelte.ts
index 481cad499..e0f14d6c6 100644
--- a/ts/svelte/svelte.ts
+++ b/ts/svelte/svelte.ts
@@ -7,7 +7,7 @@ import * as worker from "@bazel/worker";
 import { svelte2tsx } from "svelte2tsx";
 import preprocess from "svelte-preprocess";
 import { basename } from "path";
-import * as ts from "typescript";
+import ts from "typescript";
 import * as svelte from "svelte/compiler";
 
 const parsedCommandLine: ts.ParsedCommandLine = {
@@ -133,6 +133,21 @@ function readFile(file: string): Promise<string> {
     return fs.promises.readFile(file, "utf-8");
 }
 
+// https://github.com/sveltejs/svelte-preprocess/issues/373
+function removeDuplicatedAwaitImport(code: string): string {
+    const regex = /import { __awaiter } from \"tslib\";/g;
+    let first = true;
+
+    return code.replace(regex, (substring: string): string => {
+        if (first) {
+            first = false;
+            return substring;
+        }
+
+        return "";
+    });
+}
+
 async function compileSingleSvelte(
     input: SvelteInput,
     binDir: string,
@@ -157,12 +172,15 @@ async function compileSingleSvelte(
         const processed = await svelte.preprocess(input.data, preprocessOptions, {
             filename: input.path,
         });
-        const result = svelte.compile(processed.toString!(), {
+        const processedString = removeDuplicatedAwaitImport(processed.toString!());
+
+        const result = svelte.compile(processedString, {
             format: "esm",
             css: false,
             generate: "dom",
             filename: input.mjsPath,
         });
+
         // warnings are an error
         if (result.warnings.length > 0) {
             console.log(`warnings during compile: ${result.warnings}`);
@@ -177,7 +195,7 @@ async function compileSingleSvelte(
             result.js.code;
         await writeFile(input.mjsPath, outputSource);
     } catch (err) {
-        console.log(`compile failed: ${err}`);
+        console.log(`Compile failed: ${err}`);
         return;
     }
 }