gistfile1.txt

~/Desktop/nyan-0.2 »  nix-build /Users/dmj/.cache/nix-linuxkit-builder/example.nix                                                                        dmj@Davids-MacBook-Pro
these derivations will be built:
  /nix/store/h381xgbnjva8lblsnw28s5j5ww57ljsy-hello-1531489534.drv
these paths will be fetched (20.69 MiB download, 218.27 MiB unpacked):
  /nix/store/3x7dwzq014bblazs7kq20p9hyzz0qh8g-hello-2.10.tar.gz
  /nix/store/3y0wxpkxzs6yz73iw35d17qr1wp4p2i4-stdenv-linux
  /nix/store/487kalv9jm8g5fs3bm5yhby63mcpnbfv-gcc-wrapper-7.3.0
  /nix/store/4wp1i871w908b5vgbd75sw4hzhwzazs5-expand-response-params
  /nix/store/j75dgadrff2d1fyc4fczmcgqkid2imdx-binutils-2.30
  /nix/store/w8c8szci956bi10m6fh8ad802qij6w3h-binutils-wrapper-2.30
copying path '/nix/store/3x7dwzq014bblazs7kq20p9hyzz0qh8g-hello-2.10.tar.gz' from 'https://cache.nixos.org'...
copying path '/nix/store/4wp1i871w908b5vgbd75sw4hzhwzazs5-expand-response-params' from 'https://cache.nixos.org'...
copying path '/nix/store/j75dgadrff2d1fyc4fczmcgqkid2imdx-binutils-2.30' from 'https://cache.nixos.org'...
copying path '/nix/store/w8c8szci956bi10m6fh8ad802qij6w3h-binutils-wrapper-2.30' from 'https://cache.nixos.org'...
copying path '/nix/store/487kalv9jm8g5fs3bm5yhby63mcpnbfv-gcc-wrapper-7.3.0' from 'https://cache.nixos.org'...
copying path '/nix/store/3y0wxpkxzs6yz73iw35d17qr1wp4p2i4-stdenv-linux' from 'https://cache.nixos.org'...
unable to open SSH connection to 'ssh://nix-linuxkit': cannot connect to 'nix-linuxkit'; trying other available machines...
error: a 'x86_64-linux' is required to build '/nix/store/h381xgbnjva8lblsnw28s5j5ww57ljsy-hello-1531489534.drv', but I am a 'x86_64-darwin'

gistfile2.txt

~/Desktop/nyan-0.2 » tree ~/.cache/nix-linuxkit-builder/                                                                                                  dmj@Davids-MacBook-Pro
/Users/dmj/.cache/nix-linuxkit-builder/
|-- configure
|-- example.nix
|-- gcroot -> /nix/store/n30zl4bl4k7ixr4nbdzks31q26mgc9dm-daemon.plist
|-- keys
|   |-- client
|   |-- client.pub
|   |-- known_host
|   |-- ssh_host_ecdsa_key
|   `-- ssh_host_ecdsa_key.pub
`-- server-config.tar

output.sh

~/Desktop/nyan-0.2 » nnix-linuxkit-configure                                                                                                              dmj@Davids-MacBook-Pro

Generating public/private rsa key pair.
Your identification has been saved in client.
Your public key has been saved in client.pub.
The key fingerprint is:
SHA256:gznQy1F+NKptxNcZzJLVtHtamtkc64Q9dI7WIMTPtoA Nix LinuxKit Builder, Client
The key's randomart image is:
+---[RSA 2048]----+
|        . o=oo.  |
|     . + oo+oo.. |
|    . o = o.= .  |
|     o O o o o . |
|      B S E o *o+|
|       o .   ++/+|
|             .O==|
|             .o .|
|               . |
+----[SHA256]-----+
Generating public/private ecdsa key pair.
Your identification has been saved in ssh_host_ecdsa_key.
Your public key has been saved in ssh_host_ecdsa_key.pub.
The key fingerprint is:
SHA256:xFBWBByoYPkx2bjkAzUZ8SRrW8+a861v27CiVlsY018 Nix LinuxKit Builder, Server
The key's randomart image is:
+---[ECDSA 256]---+
|   o*Bo+==o      |
|  = B*o+.        |
| . *o=o o.       |
|   .*o +o .   E  |
|    ..  S+ . .   |
|       oo . .    |
|      +. o.      |
|      .oo..+     |
|     ...o==..    |
+----[SHA256]-----+
/Users/dmj/.cache/nix-linuxkit-builder/gcroot
Setting up /var/root//.ssh/nix-linuxkit-ssh-config...
Password:
Adding the SSH configuration (/var/root//.ssh/nix-linuxkit-ssh-config) to /var/root//.ssh/config...
Adding the Nix Machines configuration (/etc/nix/machines) to /etc/nix/machines...

ssh://nix-linuxkit x86_64-linux /Users/dmj/.cache/nix-linuxkit-builder/keys/client 1 1 kvm,big-parallel
Ok, try it out!

    nix-build /Users/dmj/.cache/nix-linuxkit-builder/example.nix

If this doesn't work right away, maybe wait a 10+ seconds and try again.