Wolffia an experimental nanokernel thing based heavily off of flower. You will need: rustup and a nightly Rust (if yours doesn't work, then update to latest) build to compile; The rust-src component from rustup; cargo-xbuild (cargo install it); nasm; ld; qemu (to run in a virtual machine); X server to run qemu; GNU GRUB (grub-mkrescue); GNU make; xorriso