Change in environment variables value read from SSM at deploy time does not result in new lambda version

[tbartley]

Hi,

I have code like the following:

const parameterValue = StringParameter.valueForStringParameter(scope, parameterName)

const lambda = new Function(scope, 'Lambda', {
  <props>
  environment: {
    PARAMETER_VALUE: parameterValue
  }
})

lambda.currentVersion.addAlias('Alias', {
  <alias-props>,
  provisionedConcurrentExecutions: 1
}) 

If the only change I make is to the stored value of the SSM parameter and then redeploy, then the $LATEST version of my lambda sees a change to it's the value of PARAMETER_VALUE in it's environment configuration but no new version is created and the environment variable change is then not seen by invokers of the alias.

Is this expected with the way I'm doing it?

Thanks,

Tim