cdklocal bootstrap creates S3 bucket in wrong region

[LethargicDeveloper]

When I run cdklocal bootstrap I get the following output:

bootstrapped
⏳ Bootstrapping environment aws://000000000000/us-gov-west-1...
Trusted accounts for deployment: (none)
Trusted accounts for lookup: (none)
Using default execution policy of 'arn:aws:iam::aws:policy/AdministratorAccess'. Pass '--cloudformation-execution-policies' to customize.
CDKToolkit: creating CloudFormation changeset...
✅ Environment aws://000000000000/us-gov-west-1 bootstrapped.

us-gov-west-1 is the correct region, but when I go to the localstack site and view s3 buckets:

cdk-hnb659fds-assets-000000000000-us-east-1

the bucket that gets created has the wrong suffix. It also shows up no matter which region I choose.

I haven't been able to figure out how to get it to create the s3 bucket in the correct region no matter what configuration or environment variables I setup.

[dytyniuk]

I don't have/use the LocalStack site, but it works for me.

Given the following configuration:

# ~/.aws/config
[profile localstack]
cli_pager =
region = us-east-1
endpoint_url = http://127.0.0.1:4566
services = localstack

[profile localstack-eu]
cli_pager =
region = eu-west-1
endpoint_url = http://127.0.0.1:4566
services = localstack

[services localstack]
s3 =
  endpoint_url = http://127.0.0.1:4566
sts =
  endpoint_url = http://127.0.0.1:4566

# ~/.aws/credentials
[localstack]
aws_access_key_id = test
aws_secret_access_key = test

[localstack-eu]
aws_access_key_id = test
aws_secret_access_key = test

I can bootstrap 2 regions:

$ AWS_PROFILE=localstack cdk bootstrap
 ⏳  Bootstrapping environment aws://000000000000/us-east-1...
Trusted accounts for deployment: (none)
Trusted accounts for lookup: (none)
Using default execution policy of 'arn:aws:iam::aws:policy/AdministratorAccess'. Pass '--cloudformation-execution-policies' to customize.
CDKToolkit: creating CloudFormation changeset...
 ✅  Environment aws://000000000000/us-east-1 bootstrapped.
$ AWS_PROFILE=localstack-eu cdk bootstrap
 ⏳  Bootstrapping environment aws://000000000000/eu-west-1...
Trusted accounts for deployment: (none)
Trusted accounts for lookup: (none)
Using default execution policy of 'arn:aws:iam::aws:policy/AdministratorAccess'. Pass '--cloudformation-execution-policies' to customize.
CDKToolkit: creating CloudFormation changeset...
 ✅  Environment aws://000000000000/eu-west-1 bootstrapped.
$ aws s3api list-buckets --profile localstack-eu
{
    "Buckets": [
        {
            "Name": "cdk-hnb659fds-assets-000000000000-eu-west-1",
            "CreationDate": "2026-03-09T13:41:28+00:00",
            "BucketRegion": "eu-west-1"
        },
        {
            "Name": "cdk-hnb659fds-assets-000000000000-us-east-1",
            "CreationDate": "2026-03-09T13:41:18+00:00",
            "BucketRegion": "us-east-1"
        }
    ],
    "Owner": {
        "DisplayName": "webfile",
        "ID": "75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a"
    },
    "Prefix": null
}