diff --git a/scripts/verify-github-migration.ts b/scripts/verify-github-migration.ts
index a06d715..6ded790 100644
--- a/scripts/verify-github-migration.ts
+++ b/scripts/verify-github-migration.ts
@@ -8,9 +8,6 @@ const themeSourceDir = join(root, "themes", "github-light");
 const darkThemeSourceDir = join(root, "themes", "github-dark");
 const tokenSourceDir = join(root, "styles", "tokens");
 const packageJson = JSON.parse(await readFile(join(root, "package.json"), "utf8")) as { version?: string };
-const githubThemePackageJson = JSON.parse(
-  await readFile(join(root, ".github-theme", "package.json"), "utf8"),
-) as { version?: string };
 const generated = await readFile(generatedPath, "utf8");
 const generatedDark = await readFile(generatedDarkPath, "utf8");
 
@@ -39,8 +36,20 @@ if (packageJson.version !== "1.26.1") {
   throw new Error(`project version must be 1.26.1, got ${packageJson.version}`);
 }
 
-if (githubThemePackageJson.version !== "1.26.1") {
-  throw new Error(`.github-theme version must be 1.26.1, got ${githubThemePackageJson.version}`);
+try {
+  const githubThemePackageJson = JSON.parse(
+    await readFile(join(root, ".github-theme", "package.json"), "utf8"),
+  ) as { version?: string };
+
+  if (githubThemePackageJson.version !== "1.26.1") {
+    throw new Error(`.github-theme version must be 1.26.1, got ${githubThemePackageJson.version}`);
+  }
+} catch (error) {
+  const code = error instanceof Error && "code" in error ? error.code : undefined;
+
+  if (code !== "ENOENT") {
+    throw error;
+  }
 }
 
 await access(join(root, "themes", "index.ts"));