diff --git a/src/createRollupConfig.ts b/src/createRollupConfig.ts
index eedc7dd5b..c1b08f70d 100644
--- a/src/createRollupConfig.ts
+++ b/src/createRollupConfig.ts
@@ -10,11 +10,18 @@ import replace from '@rollup/plugin-replace';
 import resolve from '@rollup/plugin-node-resolve';
 import sourceMaps from 'rollup-plugin-sourcemaps';
 import typescript from 'rollup-plugin-typescript2';
+import * as fs from 'fs-extra';
 import ts from 'typescript';
 
 import { extractErrors } from './errors/extractErrors';
 import { babelPluginTsdx } from './babelPluginTsdx';
-import { TsdxOptions } from './types';
+import { TsdxOptions, PackageJson } from './types';
+
+let appPackageJson: PackageJson;
+
+try {
+  appPackageJson = fs.readJSONSync(paths.appPackageJson);
+} catch (e) {}
 
 const errorCodeOpts = {
   errorMapFilePath: paths.appErrorsJson,
@@ -35,7 +42,7 @@ export async function createRollupConfig(
     opts.minify !== undefined ? opts.minify : opts.env === 'production';
 
   const outputName = [
-    `${paths.appDist}/${safePackageName(opts.name)}`,
+    `${paths.appDist}/${safePackageName(appPackageJson.name)}`,
     opts.format,
     opts.env,
     shouldMinify ? 'min' : '',
diff --git a/src/index.ts b/src/index.ts
index dc907ed69..ab1c2ff72 100755
--- a/src/index.ts
+++ b/src/index.ts
@@ -293,7 +293,7 @@ prog
     opts.name = opts.name || appPackageJson.name;
     opts.input = await getInputs(opts.entry, appPackageJson.source);
     if (opts.format.includes('cjs')) {
-      await writeCjsEntryFile(opts.name);
+      await writeCjsEntryFile(appPackageJson.name);
     }
 
     type Killer = execa.ExecaChildProcess | null;
@@ -393,7 +393,7 @@ prog
     await cleanDistFolder();
     const logger = await createProgressEstimator();
     if (opts.format.includes('cjs')) {
-      const promise = writeCjsEntryFile(opts.name).catch(logError);
+      const promise = writeCjsEntryFile(appPackageJson.name).catch(logError);
       logger(promise, 'Creating entry file');
     }
     try {