diff --git a/packages/dev/scripts/polkadot-dev-build-ts.mjs b/packages/dev/scripts/polkadot-dev-build-ts.mjs
index e1c8dd205..5135a5b1a 100755
--- a/packages/dev/scripts/polkadot-dev-build-ts.mjs
+++ b/packages/dev/scripts/polkadot-dev-build-ts.mjs
@@ -293,10 +293,10 @@ function findFiles (buildDir, extra = '', exclude = []) {
     .readdirSync(currDir)
     .reduce((all, jsName) => {
       const jsPath = `${extra}/${jsName}`;
-      const thisPath = path.join(buildDir, jsPath);
+      const fullPathEsm = path.join(buildDir, jsPath);
       const toDelete = (
         // no test paths
-        thisPath.includes('/test/') ||
+        jsPath.includes('/test/') ||
         // // no tests
         ['.manual.', '.spec.', '.test.'].some((t) => jsName.includes(t)) ||
         // no .d.ts compiled outputs
@@ -310,13 +310,13 @@ function findFiles (buildDir, extra = '', exclude = []) {
         )
       );
 
-      if (fs.statSync(thisPath).isDirectory()) {
+      if (fs.statSync(fullPathEsm).isDirectory()) {
         findFiles(buildDir, jsPath).forEach((entry) => all.push(entry));
       } else if (toDelete) {
-        const cjsPath = path.join(`${buildDir}-cjs`, jsPath);
+        const fullPathCjs = path.join(`${buildDir}-cjs`, jsPath);
 
-        fs.unlinkSync(thisPath);
-        fs.existsSync(cjsPath) && fs.unlinkSync(cjsPath);
+        fs.unlinkSync(fullPathEsm);
+        fs.existsSync(fullPathCjs) && fs.unlinkSync(fullPathCjs);
       } else {
         if (!exclude.some((e) => jsName === e)) {
           // this is not mapped to a compiled .js file (where we have dual esm/cjs mappings)