I have spent the past few days working on building a custom image of NixOS for my Raspberry Pi, taking note of all the problems that I encountered along the way to write about it. It has certainly been an interesting experience, as I am building the image emulating AArch64 (or ARM64v8, the architecture of the Pi 3) with QEMU, so I wasn’t expecting a smooth ride at all. There was one particular problem, though, which had my head scratching for a while.