to find packages which need a certain dependent package

[gfp]

Hi Guix,

how can I find out which packages use a dependence package?

e.g.
qtwebengine-6.8.2.drv

when wanting to upgrade because of security reasons,
it downloaded qtwebengine with more than 600 MiB
and building it takes approx 8 hours. So I cancelled that.

I was thinking about finding out which packages need qtwebengine.

How can I do that?

thanks

Gottfried

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