diff --git a/lerna.json b/lerna.json
index df22c511..2ed497d0 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,6 +1,6 @@
 {
   "lerna": "2.0.0-beta.38",
-  "version": "0.7.1",
+  "version": "0.7.3",
   "npmClient": "yarn",
   "packages": [
     "packages/*"
diff --git a/scripts/build.js b/scripts/build.js
index 73f9c083..16455b23 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -125,6 +125,9 @@ function buildFileFor(file, silent, env) {
   } else {
     const transformed = babel.transformFileSync(file, babelOptions).code;
     fs.writeFileSync(destPath, transformed);
+    if (/\@flow/.test(fs.readFileSync(file))) {
+      fs.createReadStream(file).pipe(fs.createWriteStream(destPath + '.flow'));
+    }
     silent ||
       process.stdout.write(
         chalk.green('  \u2022 ') +