{ pkgs ? import <nixpkgs> {} }:
let
  mach-nix = import (builtins.fetchGit {
    url = "https://github.com/DavHau/mach-nix";
    ref = "refs/tags/3.3.0";
  }) {
    python = "python39Full";
  };
  fcSpline = (mach-nix.buildPythonPackage
    {src=/home/hiro/src/fcSpline;
     pname="fcSpline";
     version="0.1";
     requirements=''
           numpy
           cython
           setuptools
           scipy
       '';
    });
  pyEnv = mach-nix.mkPython rec {
    packagesExtra = [
      fcSpline
      (mach-nix.buildPythonPackage
        {src=/home/hiro/src/stocproc;
         pname="stocproc";
         packagesExtra = [fcSpline];
         # buildInputs.add = [fcSpline];
         version = "1.0.0";
         requirements = ''
           numpy
           cython
           setuptools
           mpmath
           scipy
       '';
        })
    ];
    _.stocproc.buildInputs.add = [fcSpline];
    #_.stocproc.patches = [./stocproc.patch];
    requirements = ''
    numpy
    jupyter-spaces
    ptpython
    jedi
    black
    flake8
    matplotlib
    scipy
    jupyter
    h5py
    sqlitedict
    pycairo
    pygobject
    lmfit
  '';
    ignoreCollisions = true;
    providers.tk = "nixpkgs";
  };
in
pkgs.mkShell {
  buildInputs = [pyEnv pkgs.cairo ];
}