diff --git a/mobx/webpack.config.mjs b/mobx/webpack.config.mjs
index 5562b9c6..fdfe638f 100644
--- a/mobx/webpack.config.mjs
+++ b/mobx/webpack.config.mjs
@@ -3,7 +3,7 @@ import { fileURLToPath } from "url";
 import TerserPlugin from "terser-webpack-plugin";
 import { LicenseFilePlugin } from "generate-license-file-webpack-plugin";
 
-import CacheBusterCommentPlugin from "../startup-helper/BabelCacheBuster.mjs";
+import CacheBusterCommentPlugin from "../utils/BabelCacheBuster.mjs";
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
diff --git a/tests/run-build.mjs b/tests/run-build.mjs
index 658afb5b..cec59402 100644
--- a/tests/run-build.mjs
+++ b/tests/run-build.mjs
@@ -43,10 +43,15 @@ async function findPackageJsonFiles(dir, accumulator=[]) {
         if (dirent.name === "node_modules" || dirent.name === ".git")
             continue;
         const fullPath = path.join(dir, dirent.name);
-        if (dirent.isDirectory())
+        if (dirent.isDirectory()) {
+            // Ignore third-party git dirs.
+            if (fs.existsSync(path.join(fullPath, ".git"))) {
+                continue;
+            }
             findPackageJsonFiles(fullPath, accumulator);
-        else if (dirent.name === "package.json")
+        } else if (dirent.name === "package.json") {
             accumulator.push(fullPath)
+        }
     }
     return accumulator;
 }
@@ -56,6 +61,7 @@ async function runBuilds() {
     let success = true;
 
     logInfo(`Found ${packageJsonFiles.length} package.json files`);
+    console.log(packageJsonFiles)
     let filteredPackageJsonFiles = packageJsonFiles;
     if (options.changedDirs?.size === 0) {
         logInfo("No file changes detected, skipping all");