Are revision and sha256 the same? #425

Guelakais · 2024-10-17T12:48:10Z

Guelakais
Oct 17, 2024

(
      # Put the most recent revision here:
      let revision = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; in
      builtins.fetchTarball {
        url = "https://github.com/Jovian-Experiments/Jovian-NixOS/archive/${revision}.tar.gz";
        # Update the hash as needed:
        sha256 = "sha256:0000000000000000000000000000000000000000000000000000";
      } + "/modules"
    )

What are the revision numbers and where to get them?
However, if I try the following,

imports = [
    /etc/nixos/hardware-configuration.nix
    (
      # Put the most recent revision here:
      let revision = "e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8"; in
      builtins.fetchTarball {
        url = "https://github.com/Jovian-Experiments/Jovian-NixOS/archive/${revision}.tar.gz";
        # Update the hash as needed:
        sha256 = "sha256:e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8";
      } + "/modules"
    )
  ];

I get the following error:

error:
       … while evaluating the attribute 'config'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: infinite recursion encountered

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:508:28:

          507|         builtins.addErrorContext (context name)
          508|           (args.${name} or config._module.args.${name})
             |                            ^
          509|       ) (lib.functionArgs f);
building Nix...
error:
       … while evaluating the attribute 'config'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: infinite recursion encountered

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:508:28:

          507|         builtins.addErrorContext (context name)
          508|           (args.${name} or config._module.args.${name})
             |                            ^
          509|       ) (lib.functionArgs f);
building the system configuration...
error:
       … while evaluating the attribute 'config.system.build.toplevel'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: infinite recursion encountered

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:508:28:

          507|         builtins.addErrorContext (context name)
          508|           (args.${name} or config._module.args.${name})
             |                            ^
          509|       ) (lib.functionArgs f);

Answered by K900

Oct 17, 2024

The revisions are commit hashes, such as the ones on the right here: https://github.com/Jovian-Experiments/Jovian-NixOS/commits/development/. You can click the "copy full SHA" button to get the commit hash, like "e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8". Note that this is not the same thing as the sha256 hash, that should be set to all zeroes and then updated with the value Nix tells you to use when you try a build.

View full answer

K900 · 2024-10-17T12:51:58Z

K900
Oct 17, 2024
Maintainer

The revisions are commit hashes, such as the ones on the right here: https://github.com/Jovian-Experiments/Jovian-NixOS/commits/development/. You can click the "copy full SHA" button to get the commit hash, like "e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8". Note that this is not the same thing as the sha256 hash, that should be set to all zeroes and then updated with the value Nix tells you to use when you try a build.

1 reply

Guelakais Oct 17, 2024
Author

That sounds like very important information that I would have liked to have had earlier.

Guelakais · 2024-10-17T12:59:53Z

Guelakais
Oct 17, 2024
Author

Ok, it looks now like this:

  imports = [
    /etc/nixos/hardware-configuration.nix
    (
      # Put the most recent revision here:
      let revision = "e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8"; in
      builtins.fetchTarball {
        url = "https://github.com/Jovian-Experiments/Jovian-NixOS/archive/${revision}.tar.gz";
        # Update the hash as needed:
        sha256 = "sha256:0000000000000000000000000000000000000000000000000000";
      } + "/modules"
    )
  ];

But produces the following error:

unpacking channels...
error:
       … while evaluating the attribute 'config'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: infinite recursion encountered

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:508:28:

          507|         builtins.addErrorContext (context name)
          508|           (args.${name} or config._module.args.${name})
             |                            ^
          509|       ) (lib.functionArgs f);
building Nix...
error:
       … while evaluating the attribute 'config'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: infinite recursion encountered

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:508:28:

          507|         builtins.addErrorContext (context name)
          508|           (args.${name} or config._module.args.${name})
             |                            ^
          509|       ) (lib.functionArgs f);
building the system configuration...
error:
       … while evaluating the attribute 'config.system.build.toplevel'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: infinite recursion encountered

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:508:28:

          507|         builtins.addErrorContext (context name)
          508|           (args.${name} or config._module.args.${name})
             |                            ^
          509|       ) (lib.functionArgs f);

0 replies

K900 · 2024-10-17T13:01:46Z

K900
Oct 17, 2024
Maintainer

That seems unrelated. Have you changed anything else in your config? Can you post the whole thing?

8 replies

K900 Oct 17, 2024
Maintainer

You're using NixOS 24.05, we don't support that. Please use unstable.

Guelakais Oct 17, 2024
Author

hm

unpacking channels...
error:
       … while evaluating the attribute 'config'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: hash mismatch in file downloaded from 'https://github.com/Jovian-Experiments/Jovian-NixOS/archive/e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8.tar.gz':
         specified: sha256:0000000000000000000000000000000000000000000000000000
         got:       sha256:1qq8xaw59njz6ssrvmvrx8bixgs1lk98b88rawb5q1ajvz89kwdl
building Nix...
error:
       … while evaluating the attribute 'config'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: hash mismatch in file downloaded from 'https://github.com/Jovian-Experiments/Jovian-NixOS/archive/e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8.tar.gz':
         specified: sha256:0000000000000000000000000000000000000000000000000000
         got:       sha256:1qq8xaw59njz6ssrvmvrx8bixgs1lk98b88rawb5q1ajvz89kwdl
building the system configuration...
error:
       … while evaluating the attribute 'config.system.build.toplevel'

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          323|         _module = checked (config._module);

       … while calling the 'seq' builtin

         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:

          321|         options = checked options;
          322|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          323|         _module = checked (config._module);

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: hash mismatch in file downloaded from 'https://github.com/Jovian-Experiments/Jovian-NixOS/archive/e5c6aed9b62f7f0bc8d48d61c83b897a20903ad8.tar.gz':
         specified: sha256:0000000000000000000000000000000000000000000000000000
         got:       sha256:1qq8xaw59njz6ssrvmvrx8bixgs1lk98b88rawb5q1ajvz89kwdl

K900 Oct 17, 2024
Maintainer

Looks like you did not update the hash in your configuration.

Guelakais Oct 17, 2024
Author

You're using NixOS 24.05, we don't support that. Please use unstable.
I thought, I had everything.

sudo nix-channel --list                                                                        17.10.2024 15:55:49
nixos https://nixos.org/channels/nixos-unstable
unstable https://nixos.org/channels/nixos-unstable

K900 Oct 17, 2024
Maintainer

Then you need to run sudo nix-channel --update. Also, make sure nix-channel --list (no sudo) shows you no channels.

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Are revision and sha256 the same? #425

Guelakais Oct 17, 2024

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