Reverse mode: Show referrers/dependents

[axelkar]

Like a GUI for nix-store --query --referrers.

[eclairevoyant]

Press w for the why-depends modal.

[axelkar]

With why-depends you're still going down the tree. In a derivation graph A -> B -> C, I want to see A when I run nix-tree --referrers C.