Small snippet how to run a command with a few extra dependencies inside of the environment in an ad-hoc fashion.

Channels can play a tricky role when using the Nix package manager to manage development environments. Especially when one want to make sure that a derivation builds against multiple channels. This post shows how to quickly build a derivation against a different channel based on setting a URL into the include path for Nix.

Sometimes I want to install a Python dependency into my working environment just to try out something quickly, and decide afterwards if I want to keep it or not. This is a case where a good old run of pip install would do just fine.