diff --git a/packages/k8s/src/k8s/index.ts b/packages/k8s/src/k8s/index.ts
index aac84409..6fee8675 100644
--- a/packages/k8s/src/k8s/index.ts
+++ b/packages/k8s/src/k8s/index.ts
@@ -14,7 +14,8 @@ import {
   PodPhase,
   mergePodSpecWithOptions,
   mergeObjectMeta,
-  useKubeScheduler
+  useKubeScheduler,
+  fixArgs
 } from './utils'
 
 const kc = new k8s.KubeConfig()
@@ -226,6 +227,7 @@ export async function execPodStep(
   stdin?: stream.Readable
 ): Promise<void> {
   const exec = new k8s.Exec(kc)
+  command = fixArgs(command)
   await new Promise(async function (resolve, reject) {
     await exec.exec(
       namespace(),
diff --git a/packages/k8s/tests/prepare-job-test.ts b/packages/k8s/tests/prepare-job-test.ts
index 7047fa0c..80cb6dc7 100644
--- a/packages/k8s/tests/prepare-job-test.ts
+++ b/packages/k8s/tests/prepare-job-test.ts
@@ -91,6 +91,15 @@ describe('Prepare job', () => {
     expect(services[0].args).toBe(undefined)
   })
 
+  it('should determine alpine correctly', async () => {
+    prepareJobData.args.container.image = 'alpine:latest'
+    await prepareJob(prepareJobData.args, prepareJobOutputFilePath)
+    const content = JSON.parse(
+      fs.readFileSync(prepareJobOutputFilePath).toString()
+    )
+    expect(content.isAlpine).toBe(true)
+  })
+
   it('should run pod with extensions applied', async () => {
     process.env[ENV_HOOK_TEMPLATE_PATH] = path.join(
       __dirname,