Pretty much. I do have some releases, but considering Nix’s philosophy you probably should. Ventoy-CPIO should build fine, if the right toolchains and dietlibc are in PATH. Ventoy-boot relies on overlay mounts though, so it might not build within Nix.
Interesting. Sadly it only supports FAT32, NTFS and EXFAT with no Linux filesystems.
And Ventoy is free. It’s hard to argue with free.