Build failure: python3Packages.flax

[aryanjassal]

Steps To Reproduce

Steps to reproduce the behavior:

1. build pkgs.python312Packages.flax

Build log

[user@system:~]$ nix develop
error:
       … while calling the 'derivationStrict' builtin

         at /builtin/derivation.nix:9:12: (source not available)

       … while evaluating derivation 'od-devshell'
         whose name attribute is located at /nix/store/244kjyilbmi4mr3lpgk95wc18v9w73wh-source/pkgs/stdenv/generic/make-derivation.nix:331:7

       … while evaluating attribute 'buildInputs' of derivation 'od-devshell'

         at /nix/store/244kjyilbmi4mr3lpgk95wc18v9w73wh-source/pkgs/stdenv/generic/make-derivation.nix:378:7:

          377|       depsHostHost                = elemAt (elemAt dependencies 1) 0;
          378|       buildInputs                 = elemAt (elemAt dependencies 1) 1;
             |       ^
          379|       depsTargetTarget            = elemAt (elemAt dependencies 2) 0;

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

       error: ipython-genutils-0.2.0 not supported for interpreter python3.12

Detailed build log: gist

Additional context

This was happening with commit 9c513fc6fb75142f6aec6b7545cb8af2236b80f5 (latest nixpkgs-unstable as of writing this) and 2893f56de08021cffd9b6b6dfc70fd9ccd51eb60 (latest nixos-unstable as of writing this). After changing the branch to 906320ae02f769d13a646eb3605a9821df0d6ea2 (latest nixos-23.11 as of writing this), the issue went away. The packages are also not marked as "broken" either. The broken commits are dated 24th June and 25th June respectively, where the working commit is dated 23rd June.

Notify maintainers

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.6.32, Dell Precision 3480, noversion, nobuild`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.18.2`
 - nixpkgs: `/etc/nixpkgs`

---

Add a 👍 reaction to issues you find important.

[eclairevoyant]

FYI if you want to use python 3.11 you'd have to explicitly use python311Packages.

[aryanjassal]

FYI if you want to use python 3.11 you'd have to explicitly use python311Packages.

I tried using python311Packages, python312Packages and even python3Packages but this issue remained on the two broken commits.

[eclairevoyant]

The error (and the code that generates it) specifically mention that the dependency is not available for python 3.12, so that's impossible for you to have the same error with python311Packages.

[aryanjassal]

The error (and the code shat generates it) specifically mention that the dependency is not available for python 3.12, so that's impossible for you to have the same error with python311Packages.

Ah, I wasn't clear in the description. I get a similar error, but with python311Packages instead of 312. I will update thr issue to better reflect this

[aryanjassal]

The python311Packages issue was actually due to a much older commit, as I can't see this issue when I'm trying to compile it now.

Instead, I get this error similar to this.

Even though the issue is not related to python311Packages.flax anymore, it still exists for python312Packages.flax, and the package isn't marked broken either.

[eclairevoyant]

I get this error similar to this.

Which is already being discussed under #321920.

it still exists for python312Packages.flax, and the package isn't marked broken either

It pretty explicitly tells you that python 3.12 is unsupported for the ipython-genutils dependency, not sure what more can be done here?

btw, neither of these errors are related to flax.

[aryanjassal]

It pretty explicitly tells you that python 3.12 is unsupported for the ipython-genutils dependency, not sure what more can be done here?

I looked at the package information on mynixos.com and it stated that the python312Packages.flax was not broken, which is why I was confused. My proposed solution would be to simply change the metadata to reflect that.

btw, neither of these errors are related to flax.

I guess you're right about that. This issue is no longer about python3Packages.flax's build failure, so I will be closing it then.

[eclairevoyant]

I looked at the package information on mynixos.com and it stated that the python312Packages.flax was not broken

nixpkgs/pkgs/development/python-modules/ipython-genutils/default.nix

Lines 16 to 17 in 59b1aef

	# uses the imp module, upstream says "DO NOT USE"
	disabled = pythonAtLeast "3.12";

is what indicates that the package isn't available for a certain python interpreter version. mynixos isn't an official tool, so we don't have control over how they display that information, but ultimately the most straightforward way to know if some package's dependency tree is buildable, is to try to build it.