diff --git a/src/cli-main.ts b/src/cli-main.ts
index 1c40dac1..21944395 100644
--- a/src/cli-main.ts
+++ b/src/cli-main.ts
@@ -16,6 +16,7 @@ export async function main(options: Options = {}) {
     .command('[...files]', 'Bundle files', {
       ignoreOptionDefaultValue: true,
     })
+    .option('--entry.* <file>', 'Use a key-value pair as entry files')
     .option('-d, --out-dir <dir>', 'Output directory', { default: 'dist' })
     .option('--format <format>', 'Bundle format, "cjs", "iife", "esm"', {
       default: 'cjs',
@@ -91,7 +92,7 @@ export async function main(options: Options = {}) {
       Object.assign(options, {
         ...flags,
       })
-      if (files.length > 0) {
+      if (!options.entry && files.length > 0) {
         options.entry = files.map(slash)
       }
       if (flags.format) {
diff --git a/test/index.test.ts b/test/index.test.ts
index 77acc078..cf12a64e 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -907,3 +907,20 @@ test('custom config file', async () => {
     ]
   `)
 })
+
+test('use an object as entry from cli flag', async () => {
+  const { outFiles } = await run(
+    getTestName(),
+    {
+      'input.ts': `export const foo = [1,2,3]`,
+    },
+    {
+      flags: ['--entry.foo', 'input.ts'],
+    }
+  )
+  expect(outFiles).toMatchInlineSnapshot(`
+    [
+      "foo.js",
+    ]
+  `)
+})