如何在CDK中引用来自不同地区的代码构建项目?

我正在使用CDK来部署代码管道。我的设计是将代码构建项目部署到不同的区域,并在一个区域的单个管道中引用它们。

我将代码构建项目构建为:

export class CodebuildCdkStack extends cdk.Stack {
  region: string;

  constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props);
  }

  createCodebuildProject = () => {
    return new codebuild.PipelineProject(this, name, ...
    });
  }
}

const project1 = new CodebuildCdkStack(this, 'project1', {env: {region: 'ap-southeast-1', account}});

const project2 = new CodebuildCdkStack(this, 'project2', {env: {region: 'ap-southeast-2', account}});

actions1 =new actions.CodeBuildAction({
          ...
          project: codebuild.PipelineProject.fromProjectArn(this, `project1`, project1.projectArn),
});

actions2 =new actions.CodeBuildAction({
          ...
          project: codebuild.PipelineProject.fromProjectArn(this, `project2`, project2.projectArn),
});

当我跑步时 cdk deploy ,我收到了以下错误:

The 'account' property must be a concrete value (action: 'project1')

经过一些调试,我发现了 project1.projectArn 不是Arn字符串,而是Token对象。那么,我如何才能以正确的方式引用代码构建项目呢?