flake does not provide attribute 'packages.x86_64-linux.nixosConfigurations."hetzner-cloud".config.system.build.Script

[freylyons]

I have cloned https://github.com/nix-community/nixos-anywhere-examples to https://github.com/freylyons/hetzner-nixos-installer

I made some minor changes to the configuration of the root configuration in disk-config.nix

I have tried to run the generic and the hetzner-cloud builds. I have tried running with and without sudo. I am running this on a NixOS system with flakes enabled.

I ran the test under https://github.com/nix-community/nixos-anywhere/blob/main/docs/quickstart.md#7-optional-test-your-nixos-and-disko-configuration and it completed successfully

this is the most recent output with sudo and generic. All combinations have resulted in the same error.

### Uploading install SSH keys ###
/run/current-system/sw/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/tmp/tmp.DMGC7m8DzI/nixos-anywhere.pub"
/run/current-system/sw/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/run/current-system/sw/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
root@<remote-address>'s password: 

Number of key(s) added: 1

Now try logging into the machine, with: "ssh -i /tmp/tmp.DMGC7m8DzI/nixos-anywhere -o 'ConnectTimeout=10' -o 'UserKnownHostsFile=/dev/null' -o 'StrictHostKeyChecking=no' 'root
@<remote-address>'"
and check to make sure that only the key(s) you wanted were added.

### Gathering machine facts ###
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
### Switching system into kexec ###
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
kexec/
kexec/bzImage
kexec/ip
kexec/run
kexec/initrd
kexec/kexec
Connection to <remote-address> closed.
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
Linux rescue 6.12.19 #1 SMP Fri Mar 14 05:34:52 UTC 2025 x86_64

-------------------------------------------------------------------------------------------------------------------------

  Welcome to the Hetzner Rescue System.

  This Rescue System is based on Debian GNU/Linux 12 (bookworm) with a custom kernel.
  You can install software like you would in a normal system.

  To install a new operating system from one of our prebuilt images, run 'installimage' and follow the instructions.

  Important note: Any data that was not written to the disks will be lost during a reboot.

  For additional information, check the following resources:
    Rescue System:           https://docs.hetzner.com/robot/dedicated-server/troubleshooting/hetzner-rescue-system
    Installimage:            https://docs.hetzner.com/robot/dedicated-server/operating-systems/installimage
    Install custom software: https://docs.hetzner.com/robot/dedicated-server/operating-systems/installing-custom-images
    other articles:          https://docs.hetzner.com/robot

-------------------------------------------------------------------------------------------------------------------------

Rescue System (via Legacy/CSM) up since 2025-04-26 18:09 +02:00

Hardware data:

   CPU1: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz (Cores 8)
   Memory:  64108 MB (Non-ECC)
   Disk /dev/nvme0n1: 512 GB (=> 476 GiB) 
   Disk /dev/nvme1n1: 512 GB (=> 476 GiB) 
   Total capacity 953 GiB with 2 Disks

Network data:
   eth0  LINK: yes
         MAC:  <remote-address>
         IP:   <remote-address>
         IPv6: <remote-address>
         Intel(R) PRO/1000 Network Driver

+ kexec_extra_flags=
+ [ 2 -gt 0 ]
+ kexec_extra_flags=
+ shift
+ shift
+ [ 0 -gt 0 ]
+ init=/nix/store/vzzg5a1rszrnqq6yd6x4h3m3ypy2f972-nixos-system-nixos-installer-24.11pre-git/init
+ kernelParams=nouveau.modeset=0 console=tty0 console=ttyS0,115200 zswap.enabled=1 zswap.max_pool_percent=50 zswap.compressor=zstd zswap.zpool=zsmalloc root=fstab loglevel=4
+ readlink -f /root/kexec/kexec/run
+ dirname /root/kexec/kexec/run
+ SCRIPT_DIR=/root/kexec/kexec
+ TMPDIR=/root/kexec/kexec mktemp -d
+ INITRD_TMP=/root/kexec/kexec/tmp.IM9oiUJF2v
+ cd /root/kexec/kexec/tmp.IM9oiUJF2v
+ trap cleanup EXIT
+ mkdir -p ssh
+ extractPubKeys /root
+ home=/root
+ key=/root/.ssh/authorized_keys
+ test -e /root/.ssh/authorized_keys
+ grep -o \(\(ssh\|ecdsa\|sk\)-[^ ]* .*\) /root/.ssh/authorized_keys
+ key=/root/.ssh/authorized_keys2
+ test -e /root/.ssh/authorized_keys2
+ test -n 
+ test -n 
+ test -e /etc/ssh/authorized_keys.d/root
+ test -n 
+ test -e /etc/ssh/ssh_host_ecdsa_key
+ cp -a /etc/ssh/ssh_host_ecdsa_key ssh
+ test -e /etc/ssh/ssh_host_ecdsa_key.pub
+ cp -a /etc/ssh/ssh_host_ecdsa_key.pub ssh
+ test -e /etc/ssh/ssh_host_ed25519_key
+ cp -a /etc/ssh/ssh_host_ed25519_key ssh
+ test -e /etc/ssh/ssh_host_ed25519_key.pub
+ cp -a /etc/ssh/ssh_host_ed25519_key.pub ssh
+ test -e /etc/ssh/ssh_host_rsa_key
+ cp -a /etc/ssh/ssh_host_rsa_key ssh
+ test -e /etc/ssh/ssh_host_rsa_key.pub
+ cp -a /etc/ssh/ssh_host_rsa_key.pub ssh
+ /root/kexec/kexec/ip --json addr
+ /root/kexec/kexec/ip -4 --json route
+ /root/kexec/kexec/ip -6 --json route
+ [ -f /etc/machine-id ]
+ cp /etc/machine-id machine-id
+ find .
+ cpio -o -H newc
+ gzip -9
16 blocks
+ kexecSyscallFlags=
+ sort -c -V
+ uname -r
+ printf %s\n 6.1 6.12.19
+ kexecSyscallFlags=--kexec-syscall-auto
+ sh -c '/root/kexec/kexec/kexec' --load '/root/kexec/kexec/bzImage'   --kexec-syscall-auto      --initrd='/root/kexec/kexec/initrd' --no-checks   --command-line 'init=/nix/st
ore/vzzg5a1rszrnqq6yd6x4h3m3ypy2f972-nixos-system-nixos-installer-24.11pre-git/init nouveau.modeset=0 console=tty0 console=ttyS0,115200 zswap.enabled=1 zswap.max_pool_percent=
50 zswap.compressor=zstd zswap.zpool=zsmalloc root=fstab loglevel=4'
machine will boot into nixos in 6s...
+ echo machine will boot into nixos in 6s...
+ test -e /dev/kmsg
+ exec
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
Connection to <remote-address> closed.
### Generating hardware-configuration.nix using nixos-generate-config ###
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
/home/frey/development/hetzner-nixos-installer /home/frey/development/hetzner-nixos-installer
/home/frey/development/hetzner-nixos-installer
Warning: Permanently added '<remote-address>' (ED25519) to the list of known hosts.
error: flake 'git+file:///home/frey/development/hetzner-nixos-installer' does not provide attribute 'packages.x86_64-linux.nixosConfigurations."generic".config.system.build.Sc
ript', 'legacyPackages.x86_64-linux.nixosConfigurations."generic".config.system.build.Script' or 'nixosConfigurations."generic".config.system.build.Script'

[gtebbutt]

Ran into the same issue, and explicitly specifying --disko-mode disko as a workaround (see #508) solved it for me.

[Sveske-Juice]

Running nixos-anywhere with nix shell instead of nix run solved it for me:

nix shell nixpkgs#nixos-anywhere
nixos-anywhere <your args>

[skbolton]

Running nixos-anywhere with nix shell instead of nix run solved it for me:

nix shell nixpkgs#nixos-anywhere
nixos-anywhere <your args>

That might only be a temporary solution since the nixpkgs version could eventually get updated to the same version that is borked at this time.

[stapelberg]

+1, I’m surprised the culprit change hasn’t been reverted yet. All the nixos-anywhere instructions just run the latest version, which seems broken because of this error.

In case it helps others: This is the syntax I used to run nixos-anywhere v1.9.0 (latest release), which seems to work:

nix run github:nix-community/nixos-anywhere/1.9.0

Specifically, I used this full command to install NixOS via SSH:

nix run github:nix-community/nixos-anywhere/1.9.0 -- \
  --flake .#zammadn \
  --generate-hardware-config nixos-generate-config ./hardware-configuration.nix \
  --target-host michael@nixos.lan

[Mic92]

Fixed in #509