snad part of config.nix

config.nix

  {
    snadShell =
      let
        plotext = ps: with ps; buildPythonPackage rec {
          pname = "plotext";
          version = "3.1.3";

          src = fetchFromGitHub {
            owner = "piccolomo";
            repo = "plotext";
            rev = "9c78491";
            sha256 = "1hf3gzjrls760z7csdg1d3rjkr4535z8af33w7hdgcfrrmvfw53y";
          };
          doCheck = false;
        };
        # сейчас не используется, полезно для отладки sklearn
        sklearn = python3Packages.scikit-learn.overrideAttrs (oldAttrs: {
          src = /home/balodja/projects/sai/scikit-learn;
          patches = [ ];
          doCheck = false;
          doInstallCheck = false;
        });
        pythonDev = ps: with ps; [
          pip scipy pandas ipython jupyter
          cython numba
          pylint flake8 pycodestyle pytest
          pdoc3
          pyqt5 pyside2 matplotlib scikit-learn
          (plotext ps)
          ];
      in mkShell {
        buildInputs = [ (python3.withPackages pythonDev) ];
        shellHook = "export SHELLENV=snadenv";
      };
  }