[@aws-cdk/aws-lambda-python] Azure DevOps - unable to prepare context

Hi, I have a project with a python3.8 lambda and Pipfile (I have also tried requirements.txt). When I try to deploy it in the Azure DevOps pipeline with command cdk deploy --require-approval=never I get error:

unable to prepare context: the Dockerfile (.../node_modules/@aws-cdk/aws-lambda-python/lib/Dockerfile.dependencies) must be within the build context

From the other project I know that it works in similar environment with requirements.txt in the 1.63 version. I have also verified that if I revert cdk in this project to 1.63 and remove Pipfile it is also working. Deployment from my own machine works in all cases. I have temporary reverted to 1.63 and use pipenv lock to be able to deploy this project.

Reproduction Steps

cdk file:

import { PythonFunction } from "@aws-cdk/aws-lambda-python";
import * as cdk from "@aws-cdk/core";
export class Stack extends cdk.Stack {
  constructor(scope: cdk.Construct, id: string, props: cdk.StackProps) {
    super(scope, id, props);
    new PythonFunction(this, "SomeFunction", {
      handler: "handler",
      entry: "./src",
      index: "handler.py",
      runtime: Runtime.PYTHON_3_8,
      // ...
    });
  }
}

and src contains handler.py with handler and Pipfile with dependencies.

What did you expect to happen?

Correct deployment of the lambda in the pipeline like on my machine.

What actually happened?

Error:

unable to prepare context: the Dockerfile (.../node_modules/@aws-cdk/aws-lambda-python/lib/Dockerfile.dependencies) must be within the build context

Environment

• CDK CLI Version : 1.74.0
• Framework Version: 1.74.0
• Node.js Version: 12
• OS : ubuntu-latest (vmImage)
• Language (Version): Python 3.8

Other

From what I have seen the file Dockerfile.dependencies is not present in the working 1.63 version.

---

This is 🐛 Bug Report

[daterr]

I ran into this issue using Jenkins for CI/CD. In my case, the solution was to upgrade the version of Docker being run (it was using 17.something before), to 19.03.14 (the latest stable). I’m not sure what the minimum version needed is, but it would be helpful if that information could be included in the documentation.

[github-actions[bot]]

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