How to uninstall deps of a failed build

[Jeremy Lavergne]

> How to uninstall all deps of a failed build.
> 
> I try to install the graphviz and it install a lot of packages. I'd
> like to uninstall all this deps of graphviz.
> 
> How can I do it?

You probably want to remove all "leaves" from the installed ports tree:
port echo leaves
sudo port uninstall leaves

You may repeat that a few times, as each level reveals new leaves.

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