pip install ewatercycle does not work nicely with Snellius

When installing ewatercycle on a Snellius machine, you get the following error:
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ESMValToolNotFoundError: ESMValTool or ESMValCore packages have not been found.

Likely because ewatercycle dependencies are not installed
in a conda environment.

Please install ewatercycle with:

```shell
curl -o conda-lock.yml https://raw.githubusercontent.com/eWaterCycle/ewatercycle/main/conda-lock.yml
conda install mamba conda-lock -n base -c conda-forge -y
conda-lock install --no-dev -n ewatercycle
conda activate ewatercycle
pip install ewatercycle
```
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Snellius does not have conda installed by default, so I am looking to see if there is another way