.env.local overrides other .env files

[HaaLeo]

Are you certain it's a bug?

• Yes, it looks like a bug

Is the issue caused by a plugin?

• It is not a plugin issue

Are you using the latest v3 release?

• Yes, I'm using the latest v3 release

Is there an existing issue for this?

• I have searched existing issues, it hasn't been reported yet

Issue description

I have a minimal serverless app with two .env files

• .env.local

  MSG='I am local'

• .env.dev

  MSG='I am dev'

Now when I package my app and with sls package --package ../../dist/packages/dev/query-api --stage dev --verbose the resources where I reference the env var via ${env:MSG} gets labeled with I am local instead of I am dev.

Service configuration (serverless.yml) content

service: my-service

useDotenv: true # See https://www.serverless.com/framework/docs/environment-variables/

plugins:
  - serverless-webpack
  - serverless-offline
  - serverless-plugin-reducer

package:
  individually: true

provider:
  name: aws
  runtime: nodejs18.x
  region: ${opt:region, 'eu-central-1'}
  stage: ${opt:stage, 'dev'}
  endpointType: REGIONAL
  httpApi:
    cors: true

functions:
  main:
    handler: src/main.handler
    memorySize: 256
    timeout: 29
    environment:
      MSG: ${env:MSG}
    events:
      - httpApi: # ApiGatewayV2
          method: any
          path: /{proxy+}

Command name and used flags

sls package --package ../../dist/packages/dev/query-api --stage dev --verbose

Command output

N/A

Environment information

Framework Core: 3.26.0 (local)
Plugin: 6.2.2
SDK: 4.3.2

[medikoo]

@HaaLeo report misses service configuration

[HaaLeo]

@medikoo I updated the description

[medikoo]

@HaaLeo what happens if you do not use serverless-offline plugin? Do you observe same behavior?