languages.python with unstable package crashes

[dmarcoux]

Describe the bug

I want to use devenv to setup a development environment for a Python project. Instead of the somewhat outdated Python 3.12.x version from the stable nixpkgs input, I want to use the latest Python version from nixpkgs-unstable. Somehow, there is an error with setting up the Python virtual environment:

Logs

``` direnv: loading ~/projets/SportsTracker/.envrc direnv: loading https://raw.githubusercontent.com/cachix/devenv/95f329d49a8a5289d31e0982652f7058a189bfca/direnvrc (sha256-d+8cBpDfDBj41inrADaJt+bDWhOktwslgoP5YiGJ1v0=) direnv: using devenv direnv: .envrc changed, reloading warning: creating lock file '/home/dany/projets/SportsTracker/devenv.lock' direnv: ([/nix/store/kj5k2wvwvqh2vnfndm82dpcr4canwyrn-direnv-2.34.0/bin/direnv export zsh]) is taking a while to execute. Use CTRL-C to give up. • Using Cachix: devenv copying path '/nix/store/wwrqmysh0dfkszbal1kdk3qid2xa95fx-devenv-1.3.1' from 'https://devenv.cachix.org' building '/nix/store/vj4hlgba88342g1gxlmn77mqiqy1zf1f-devenv-python-virtualenv.drv' building '/nix/store/pw1cpxi2w5gsvz2zg7rmgn6cksmp9cxy-devenv-shell-env.drv' direnv: updated devenv shell cache Running tasks devenv:enterShell Failed devenv:python:virtualenv 113ms Dependency failed devenv:enterShell 1 Failed, 1 Dependency Failed 113.22ms --- devenv:python:virtualenv failed with error: Task exited with status: exit status: 134 --- devenv:python:virtualenv stdout: 0000.11: ~/projets/SportsTracker ~/projets/SportsTracker 0000.10: Python interpreter changed, rebuilding Python venv... 0000.10: /nix/store/k47xf6hdvrl1w363ldj1zk977jvdwmdc-python3-3.12.6-env/bin/python3.12 -m venv --upgrade-deps /home/dany/projets/SportsTracker/.devenv/state/venv --- devenv:python:virtualenv stderr: 0000.10: *** stack smashing detected ***: terminated 0000.00: /nix/store/zb4qc5rxr4888rk42mrnfj5y6p61vjw6-devenv-python-virtualenv: line 29: 102657 Aborted (core dumped) /nix/store/k47xf6hdvrl1w363ldj1zk977jvdwmdc-python3-3.12.6-env/bin/python3.12 -m venv --upgrade-deps "$VENV_PATH" --- ```

To reproduce

devenv.nix

```nix { pkgs, lib, config, inputs, ... }: let # To use packages from nixpkgs-unstable pkgs-unstable = import inputs.nixpkgs-unstable { system = pkgs.stdenv.system; }; in { # Setup languages and their tools - https://devenv.sh/languages/ languages.python = { enable = true; package = pkgs-unstable.python312; # Enable Python virtual environment venv = { enable = true; requirements = ./requirements.txt; }; }; } ```

devenv.yaml

```yaml # yaml-language-server: $schema=https://devenv.sh/devenv.schema.json inputs: nixpkgs: url: github:cachix/devenv-nixpkgs/rolling nixpkgs-unstable: url: github:nixos/nixpkgs/nixpkgs-unstable ```

devenv.lock

``` { "nodes": { "devenv": { "locked": { "dir": "src/modules", "lastModified": 1730676843, "owner": "cachix", "repo": "devenv", "rev": "7250dbb33f62c30dec5cf1191b0947b76bec5248", "type": "github" }, "original": { "dir": "src/modules", "owner": "cachix", "repo": "devenv", "type": "github" } }, "flake-compat": { "flake": false, "locked": { "lastModified": 1696426674, "owner": "edolstra", "repo": "flake-compat", "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33", "type": "github" }, "original": { "owner": "edolstra", "repo": "flake-compat", "type": "github" } }, "gitignore": { "inputs": { "nixpkgs": [ "pre-commit-hooks", "nixpkgs" ] }, "locked": { "lastModified": 1709087332, "owner": "hercules-ci", "repo": "gitignore.nix", "rev": "637db329424fd7e46cf4185293b9cc8c88c95394", "type": "github" }, "original": { "owner": "hercules-ci", "repo": "gitignore.nix", "type": "github" } }, "nixpkgs": { "locked": { "lastModified": 1716977621, "owner": "cachix", "repo": "devenv-nixpkgs", "rev": "4267e705586473d3e5c8d50299e71503f16a6fb6", "type": "github" }, "original": { "owner": "cachix", "ref": "rolling", "repo": "devenv-nixpkgs", "type": "github" } }, "nixpkgs-stable": { "locked": { "lastModified": 1730327045, "owner": "NixOS", "repo": "nixpkgs", "rev": "080166c15633801df010977d9d7474b4a6c549d7", "type": "github" }, "original": { "owner": "NixOS", "ref": "nixos-24.05", "repo": "nixpkgs", "type": "github" } }, "nixpkgs-unstable": { "locked": { "lastModified": 1730272153, "owner": "nixos", "repo": "nixpkgs", "rev": "2d2a9ddbe3f2c00747398f3dc9b05f7f2ebb0f53", "type": "github" }, "original": { "owner": "nixos", "ref": "nixpkgs-unstable", "repo": "nixpkgs", "type": "github" } }, "pre-commit-hooks": { "inputs": { "flake-compat": "flake-compat", "gitignore": "gitignore", "nixpkgs": [ "nixpkgs" ], "nixpkgs-stable": "nixpkgs-stable" }, "locked": { "lastModified": 1730302582, "owner": "cachix", "repo": "pre-commit-hooks.nix", "rev": "af8a16fe5c264f5e9e18bcee2859b40a656876cf", "type": "github" }, "original": { "owner": "cachix", "repo": "pre-commit-hooks.nix", "type": "github" } }, "root": { "inputs": { "devenv": "devenv", "nixpkgs": "nixpkgs", "nixpkgs-unstable": "nixpkgs-unstable", "pre-commit-hooks": "pre-commit-hooks" } } }, "root": "root", "version": 7 } ```

Version

1.3.1

[sandydoo]

Could you try using languages.python.version = "3.12.7";? Does that work?

[dmarcoux]

I would like to avoid specifying the Python version, since it's building a derivation which takes about 10 minutes to complete. It does work, but it's not a great developer experience.

[sandydoo]

Which architecture and OS are you running? These should be substituted from our cache if I remember correctly.

[dmarcoux]

My OS is NixOS and the architecture is x86_64.