![change conda python version back to usr change conda python version back to usr](https://miro.medium.com/max/1104/1*JIvrl3Nc1xMnOZhzXQq8Uw.png)
![change conda python version back to usr change conda python version back to usr](https://docs.xlwings.org/en/0.16.0/_images/vba_reference.png)
To add more packages to the existing conda environment, follow these steps:
CHANGE CONDA PYTHON VERSION BACK TO USR INSTALL
Only use pip install if conda install is not available.
![change conda python version back to usr change conda python version back to usr](https://user-images.githubusercontent.com/8209940/49480316-e075ec80-f7eb-11e8-8f55-162733fddf92.png)
It is recommended that you clone the default Python environment to make updates. For more information about the Python environment in ArcGIS Pro, see Python in ArcGIS Pro.
CHANGE CONDA PYTHON VERSION BACK TO USR PRO
The following steps are for geoprocessing services published from ArcGIS Pro or using ArcPy. Starting at ArcGIS Server 10.8.1, you can specify a Python environment for a single geoprocessing service. Starting at ArcGIS Server 10.7.1, you can specify a Python environment for all geoprocessing services. Similar to ArcGIS Pro, ArcGIS Server uses conda to manage Python environments. However, if you want to install additional custom Python packages, follow the steps below. The Python installation of ArcGIS Server includes packages such as numpy and matplotlib. At ArcGIS Enterprise 10.5 and later, a Python 3-based conda environment is included with ArcGIS Server.