Does manifest.nextflowVersion control version on Seqera Platform

If I have a nextflow pipeline that defines a specific nextflow version using manifest.nextflowVersion = '1.2.3', does that enforce the nextflow version that will run when the pipeline is launched from Seqera Platform, or does it just cause the pipeline to error if that version of nextflow is not honored?

If it does enforce the nextflow version, and the pipeline also specifies a preRunScript with export NXF_VER=1.2.3, which setting takes precendence?

It does not, it is only a runtime check that the version used matches what is required.

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