On Linux installation is done through a series of scripts and vtoycli. I haven’t worked on that yet, but there’s build scripts there that should do the trick, but since they build it for multiple architectures, you’ll have to run just the stuff for your arch (probably x86_64).
sth like:
cd vtoycli/fat_io_lib/release
gcc -specs "/usr/local/musl/lib/musl-gcc.specs" -O2 -D_FILE_OFFSET_BITS=64 fat*.c -c
ar -rc libfat_io_64.a *.o
cd ../..
gcc -specs "/usr/local/musl/lib/musl-gcc.specs" -Os -static -D_FILE_OFFSET_BITS=64 -Ifat_io_lib/include fat_io_lib/lib/libfat_io_64.a *.c -o vtoycli_64
# Optional
strip --strip-all vtoycli_64
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.