How to load Wifi driver into MinimalCD USB drive

My intention: I want to install
The reason is, I don’t need most of the tools that come by default. I can just install i3 and xinit and I’ll feel right at home.

The problem: I own a Dell XPS 13 (9360) which requires the linux-firmware package because it has the required wifi drivers. Without that, the installation can’t proceed.

My question: How can I customize the mini installation drive so that it loads the linux-firmware package during the installation and in doing so, recognizes my wireless card?


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