Hi all, Good news is that the work on aarch64 support has progressed to the point where the Spectrum host can be built natively and run on aarch64 HW. It's still a bunch of patches in various stages of WIP or review to spectrum or further up the stream. In short, to "nixpkgs-spectrum": 0001-Allow-static-building-of-dtc.patch 0002-Workaround-ld-script-segmentation-fault.patch /* may be not needed */ 0003-Add-imx8-specific-kernel.patch and to "spectrum": 0001-Add-imx8-kernel.patch Should anyone want to reproduce, please let me know and I'll try to find a solution to share them. Probably worth waiting for cross-compilation support unless you have powerful aarch64 at your disposal. In the meanwhile, we try to establish a mechanism to collaborate in branches of required upstream repos. It's fairly impractical to fork "nixpkgs-spectrum"-repo due to its' size, over 2GB, Which takes me to the discussion point - what's the workflow proposal on multiple people working on the same functionality in the same branch? If I'm not mistaken the email workflow creates a new branch for each author? Then someone would have to cherry-pick them to the same branch to integrate them in dev time hydra builds. Best, -Ville