Can Lerna be run inside workspaces?

[NetherGranite]

npm run <script> can be run from within a workspace to avoid specifying the workspace's name every time, but when I try to do the same with Lerna, I get an error about the absence of lerna.json in the working directory.

Is there a way to achieve this, or do you have to run Lerna from the root and specify the workspace every time?