# conda.useMamba

**URL:** <https://community.seqera.io/t/conda-usemamba/561>\
**Category:** Ask for help\
**Tags:** nextflow\
**Created:** [March 13, 2024, 10:57am UTC](https://community.seqera.io/t/conda-usemamba/561 "2024-03-13T10:57:20Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![mribeirodantas](https://dub1.discourse-cdn.com/flex013/user_avatar/community.seqera.io/mribeirodantas/32/235_2.png) [@mribeirodantas](https://community.seqera.io/u/mribeirodantas)\
**Post date:** [March 13, 2024, 12:09pm UTC](https://community.seqera.io/t/conda-usemamba/561/2 "2024-03-13T12:09:22Z")

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Hi @irisdianauy. Welcome to the Seqera Community Forum! 😉

Command line arguments starting with a double dash, `--`, are pipeline-specific arguments, not Nextflow arguments. For Nextflow arguments, use a single dash.

This should go in configuration files, though, such as `nextflow.config`, for example

```auto
conda.useMamba = true

```

or inside the conda scope you’re already using over there, for example:

```auto
conda {
  enabled = true
  useMamba = true
}

```

You can also set conda to use mamba as solver by default. Check [this post](https://community.seqera.io/t/is-it-possible-to-use-nextflow-with-the-libmamba-conda-solver/181/4) in the forum for more info on how to do that. It’s much easier with `conda.useMamba = true`, of course, but maybe you want Mamba for other purposes too 😉

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_[View the full topic](https://community.seqera.io/t/conda-usemamba/561)._