Unable to decode mod when using non-fixed string as Pipeline index

[graza-io]

Context

When attempting to utilise a variable in the Pipeline index string, as shown below:

step "pipeline" "pl_step" {
    pipeline = pipeline["pipeline_prefix_${var.some_variable}"]
}

I get an error:

Error: Internal Error: Failed to decode mod: Invalid index: The given key does not identify an element in this collection value.

I would expect this to be parsed rather than end in a decode failure.

Flowpipe Version

❯ flowpipe --version
Flowpipe v0.4.4

Additional Notes

Currently using a transform step to work around, which parses and runs successfully, example:

step "transform" "get_pipeline_id" {
  value = "pipeline_prefix_${var.some_variable}"
}

step "pipeline" "pl_step" {
    pipeline = pipeline[step.transform.get_pipeline_id.value]
}

[github-actions]

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