root@ubuntu4:~# cd /
root@ubuntu4:/# tar -xf /nixos-system-x86_64-linux.tar.xz
root@ubuntu4:/# ls
bin   cdrom  etc   initrd.img      kexec_nixos  lib64       media  nix                               nix-path-registration  proc  run   snap  swap.img  tmp  var      vmlinuz.old
boot  dev    home  initrd.img.old  lib          lost+found  mnt    nixos-system-x86_64-linux.tar.xz  opt                    root  sbin  srv   sys       usr  vmlinuz
root@ubuntu4:/# ./kexec_nixos
+ set -e
++ mktemp -d
+ cd /tmp/tmp.UmoSpMlSGx
+ pwd
/tmp/tmp.UmoSpMlSGx
+ mkdir initrd
+ pushd initrd
/tmp/tmp.UmoSpMlSGx/initrd /tmp/tmp.UmoSpMlSGx
+ '[' -e /ssh_pubkey ']'
+ gzip -9
+ cpio -o -H newc
+ find -type f
1 block
+ popd
/tmp/tmp.UmoSpMlSGx
+ cat /nix/store/y5x5yx5sz67ar18pjljp3hk4wypzhq66-image/initrd extra.gz
+ kexec -l /nix/store/y5x5yx5sz67ar18pjljp3hk4wypzhq66-image/kernel --initrd=final.gz '--append=init=/nix/store/8n02w8d8aymg0zwy99kg0iapm18ab95r-nixos-system-kexec-20.09pre219796.f601ab37c2f/init console=ttyS0,115200 panic=30 boot.panic_on_fail loglevel=4'
kexec_load failed: Invalid argument
entry       = 0x3ffe7740 flags = 0x3e0000
nr_segments = 4
segment[0].buf   = 0x7f488b610010
segment[0].bufsz = 0x1e56de37
segment[0].mem   = 0x1fe92000
segment[0].memsz = 0x1e56e000
segment[1].buf   = 0x7f48a9b82610
segment[1].bufsz = 0x485380
segment[1].mem   = 0x3e400000
segment[1].memsz = 0x1a7e000
segment[2].buf   = 0x1cc5d30
segment[2].bufsz = 0x46e0
segment[2].mem   = 0x3ffe2000
segment[2].memsz = 0x5000
segment[3].buf   = 0x1cbeb40
segment[3].bufsz = 0x70e0
segment[3].mem   = 0x3ffe7000
segment[3].memsz = 0x9000
root@ubuntu4:/# ls /nix/store
0gr5bsynx3qnxwplqdzgj0gb60mhnzy0-libunistring-0.9.10  fgi7xhmh3hs2v5pzq2k8r4kw22h9yy9g-zlib-1.2.11         y5x5yx5sz67ar18pjljp3hk4wypzhq66-image
7s4pysk2smm1xdp787lkfz31l39l5lvf-libidn2-2.3.0        nda5ls17p5jbpghrj63bl0shyl3ibzvy-kexec-nixos         yv5zb18n6fm55414parpn4ihayp4wd31-cpio-2.13
9rabxvqbv0vgjmydiv59wkz768b5fmbc-glibc-2.30           wx8miyjwjy2rfvk2k5vfsphzflf21zii-kexec-tools-2.0.20  z4ajipns0l1s8b2lrgpy6nng4cys7h99-bash-4.4-p23