Devenv doesn't seem to copy or link my opengl libraries

[CapedBojji]

Describe the bug
A clear and concise description of what the bug is.

To reproduce
Please provide an Short, Self Contained, Correct (Compilable), Example by creating a gist using devenv.nix, devenv.yaml, and optionally devenv.lock.

Make sure to include full logs and what you expected to happen.

devenv.nix

  languages.python = {
    enable = true;
    version = "3.12.7"; 
    venv.enable = false;
    venv.requirements = ./requirements.txt;
  };

devenv.yaml

inputs:
  nixpkgs:
    url: github:cachix/devenv-nixpkgs/rolling
  nixpkgs-python:
    url: github:cachix/nixpkgs-python
    inputs:
      nixpkgs:
        follows: nixpkgs
inputs:
  nixpkgs:
    url: github:cachix/devenv-nixpkgs/rolling
  nixpkgs-python:
    url: github:cachix/nixpkgs-python
    inputs:
      nixpkgs:
        follows: nixpkgs

devenv.lock

{
  "nodes": {
    "devenv": {
      "locked": {
        "dir": "src/modules",
        "lastModified": 1732460433,
        "owner": "cachix",
        "repo": "devenv",
        "rev": "6f9f633c50265c836aa685feefe15ea2a8865d28",
        "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"
      }
    },
    "flake-compat_2": {
      "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-python": {
      "inputs": {
        "flake-compat": "flake-compat",
        "nixpkgs": [
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1730716553,
        "owner": "cachix",
        "repo": "nixpkgs-python",
        "rev": "8fcdb8ec34a1c2bae3f5326873a41b310e948ccc",
        "type": "github"
      },
      "original": {
        "owner": "cachix",
        "repo": "nixpkgs-python",
        "type": "github"
      }
    },
    "nixpkgs-stable": {
      "locked": {
        "lastModified": 1731797254,
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "e8c38b73aeb218e27163376a2d617e61a2ad9b59",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-24.05",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "pre-commit-hooks": {
      "inputs": {
        "flake-compat": "flake-compat_2",
        "gitignore": "gitignore",
        "nixpkgs": [
          "nixpkgs"
        ],
        "nixpkgs-stable": "nixpkgs-stable"
      },
      "locked": {
        "lastModified": 1732021966,
        "owner": "cachix",
        "repo": "pre-commit-hooks.nix",
        "rev": "3308484d1a443fc5bc92012435d79e80458fe43c",
        "type": "github"
      },
      "original": {
        "owner": "cachix",
        "repo": "pre-commit-hooks.nix",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "devenv": "devenv",
        "nixpkgs": "nixpkgs",
        "nixpkgs-python": "nixpkgs-python",
        "pre-commit-hooks": "pre-commit-hooks"
      }
    }
  },
  "root": "root",
  "version": 7
}

requirements.txt

imgui==2.0.0

**Version**
 devenv 1.3.1 (x86_64-linux)
Paste the output of `$ devenv version` here or tell us if you're using flakes.

[sandydoo]

@CapedBojji, could you describe your issue in a bit more detail?

• what are you trying to do?
• what do you expect to happen?
• which libraries? copy or link to where?

[CapedBojji]

@sandydoo im trying to use imgui with devenv python, but since devenv isnt linking the libgl.so files it doesnt work. i tried adding the necessary pkgs but it still doesn't work

  packages = [ pkgs.git pkgs.glfw pkgs.glew pkgs.mesa pkgs.libGL pkgs.wayland pkgs.libcxx pkgs.libxkbcommon];

im basically forced to use nixGL if i want to work with python gui. Doesn't make sense that devenv won't by default link the necessary files

[sandydoo]

Do you have a sample project or repro you can share?

With packages = [ pkgs.libGL ]; and imgui in requirements, I can import imgui and can successfully:

$ python -c "from ctypes.util import find_library;print(find_library('GL'))"
libGL.so.1

What am I looking for?

[CapedBojji]

https://github.com/CapedBojji/amazon-vet-bot
@sandydoo here you go simply just run the main.py

[CapedBojji]

@sandydoo yeah i forgot to update you. It says they exist now but now i get

/home/freren/projects/devenv-python/.devenv/state/venv/lib/python3.11/site-packages/glfw/__init__.py:917: GLFWError: (65542) b'EGL: Failed to get EGL display: Success'
  warnings.warn(message, GLFWError)

[CapedBojji]

also to note getting ride of venv = trueand using my own system venv fixes the issue but thats because the venv on my system can see the files i suppose.

[sandydoo]

Changing pkgs.libGLU -> pkgs.libGL, I get to the point where glfw fails to initialize the EGL display. But I'm running in a VM, so I have zero trust in glfw launching at all.

also to note getting ride of venv = trueand using my own system venv fixes the issue but thats because the venv on my system can see the files i suppose.

I'm not really sure why the venv would be the issue. You could try diffing your two venvs, maybe with printenv, and see what's different between the two.

This does seem more like an issue with finding the right driver. If it were about libGL, you wouldn't be able to import OpenGL.GL. If nixGL works for you, then you could try adding /run/opengl-drivers/lib to your LD_LIBRARY_PATH: LD_LIBRARY_PATH=/run/opengl-drivers/lib python main.py. Then double-check it was set in python: print(os.environ["LD_LIBRARY_PATH"]).

[CapedBojji]

i noticed i didnt have /run/opengl but that isnt neccessary as it was working in any non devenv direcotry

[CapedBojji]

Reopened to say the error was vscode not devenv it seems. At least on nixos. On nix you have to use nix gl.