Raspberry Pi Zero 2 W and NixOS Unstable - broken wifi

Ok. Solved. There is issue with rpi2 wifi so I just need to add:

  boot.extraModprobeConfig = ''
    options brcmfmac roamoff=1 feature_disable=0x82000
  '';

Source: pi 3 - RPI 3B wlan0 wifi adapter broken? - Raspberry Pi Stack Exchange

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