# Custom options and environment¶

In many cases, it may be needed to customize options passed to the various system commands used in the management of the code environment system (virtualenv, pip, R and conda)

One of the main use cases for doing so is if your DSS server does not have outgoing Internet access. In that case, you will not be able to install packages from the main repositories, and will need to pass additional arguments for custom repositories.

Custom options for virtualenv, pip, R and conda can be configured in Administration > Settings > Misc. These settings can only be configured by the DSS administrator.

These options can also be overriden on a per-code-environment basis by unchecking “Inherit global settings” in the “General > Extra options” configuration section for the code environment.