The nixbuild.net shell
The nixbuild.net shell can be accessed over ssh by running:
ssh beta.nixbuild.net shell
It doesn't matter what user name you connect with, but you need to use the SSH key that you used when your account was registered.
The shell provides you with commands for showing info about builds and
derivations. You can run the command
help to get a list of available
commands. New functionality is added continuously.
The nixbuild.net shell doesn't yet have support for command history or many other features that you could expect from a proper shell. However, you can use the rlwrap program to mitigate this:
rlwrap ssh beta.nixbuild.net shell
This will make things like Up/Down arrow keys and CTRL-R to work as you would expect.