> ## Documentation Index
> Fetch the complete documentation index at: https://wiki.latch.bio/llms.txt
> Use this file to discover all available pages before exploring further.

# Updating the Entrypoint

Every Nextflow workflow registered on Latch has an underlying Latch SDK workflow that orchestrates the execution of the Nextflow pipeline.
This Latch SDK workflow is defined as a Python script which is generated from the `latch_metadata` file when the workflow is registered.

When developing Nextflow workflows on Latch, users may want to customize their workflow by updating the generated Latch SDK workflow code.
For example, developers may want to do some additional post-processing to their workflow outputs or provide additional customization to
their workflow interface as described [here](/workflows/sdk/python/customizing-your-interface/overview). Before making any changes,
to the `entrypoint.py` file, we highly reccommend reviewing the [workflow documentation](/workflows/sdk/python/authorizing-your-own-workflow)
to understand how Latch workflow are authored.

To support this, the Latch SDK provides a command to generate the Latch SDK workflow code that executes the Nextflow pipeline:

```bash theme={null}
latch nextflow generate-entrypoint . --nf-script main.nf --execution-profile docker
```

This command generates two files:

1. `latch.config` - a Nextflow configuration file passed to Nextflow via the `-config` flag.
2. `wf/custom_entrypoint.py` - the generated Latch SDK workflow code that executes the Nextflow pipeline.

We can now modify these files and register the updated workflow by running the following commmand.

<Note>
  We purposely exclude the `--nf-script` flag in the `latch register` command to avoid
  re-generating the Latch SDK workflow code.
</Note>

```bash theme={null}
latch register .
```