Remove nix for now.

.tests-shell.nix

-# SPDX-FileCopyrightText: 2020 Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences, Germany (https://www.gfz-potsdam.de/)
-#
-# SPDX-License-Identifier: CC0-1.0
-
-{ pkgs ? import 
-    (builtins.fetchTarball {
-      name = "nixpkgs-20.09";
-      url = "https://github.com/NixOS/nixpkgs/archive/edb26126d98bc696f4f3e206583faa65d3d6e818.tar.gz";
-      sha256 = "1cl4ka4kk7kh3bl78g06dhiidazf65q8miyzaxi9930d6gwyzkci";
-    })
-rec {
-    unstable = import <unstable> {};
-    overlays = [
-        (self: super:
-
-          rec {
-            python37 = super.python37.override
-              {
-                packageOverrides = self: super: {
-		  scipy = unstable.python37Packages.scipy;
-
-                  matplotlib = super.matplotlib.overrideAttrs
-                    (oldAttrs: rec {
-                      version = "3.2.1";
-                      src = super.fetchPypi
-                        {
-                          inherit version;
-                          inherit (oldAttrs) pname;
-                          sha256 = "ffe2f9cdcea1086fc414e82f42271ecf1976700b8edd16ca9d376189c6d93aee";
-                        };
-                    });
-
-                  orthopoly = super.callPackage ./tests/nix/orthopoly.nix { };
-
-                  pyfield = super.callPackage ./tests/nix/pyfield.nix { };
-
-                  pymagglobal = super.callPackage ./pymagglobal.nix { };
-
-                };
-
-
-
-              };
-            python37Packages = python37.pkgs;
-          }
-
-
-
-        )
-      ];
-    }
-}:
-pkgs.mkShell {
-  buildInputs = with pkgs.python37Packages;
-    [ ipython pyfield pymagglobal cartopy matplotlib numpy scipy ];
-}

README.md

@@ -54,12 +54,6 @@ $ pip install pymagglobal --extra-index-url https://public:5mz_iyigu-WE3HySBH1J@
 
 Since [conda](https://docs.conda.io/) version 4.6, conda and pip get along well. So you can also run `pip install ...` from inside your conda environment.
 
-Another way to use `pymagglobal` is via nix-shell. With [nix](https://nixos.org/download.html) installed, simply run
-```console
-$ nix-shell
-```
-from within the `pymagglobal` root directory. You may also use the nix-expression [pymagglobal.nix] to include `pymagglobal` in your own environments.
-
 ## Documentation
 Check out the extended documention [here](https://sec23.git-pages.gfz-potsdam.de/korte/pymagglobal). From the command line, you can use `pymagglobal` to get various results from the models. For example,
 ```console
@@ -129,11 +123,6 @@ from `<pymagglobal>`. Some tests require `FieldTools`, `packaging` and `orthopol
 $ pip install pymagglobal[tests] --extra-index-url https://public:5mz_iyigu-WE3HySBH1J@git.gfz-potsdam.de/api/v4/projects/1055/packages/pypi/simple
 ```
 
-We also provide the expression for a nix-shell with all dependencies installed. This will however not test your local installation, but your local repository. To perform the tests, run
-```console
-$ nix-shell .tests-shell.nix --run "python tests/run_tests.py"
-```
-
 [FieldTools]: http://doi.org/10.5880/fidgeo.2019.033
 
 ## Contact

pymagglobal.nix

-# This file complements pymagglobal.
-#
-# It is licensed under CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/)
-
-{ python
-, buildPythonPackage
-, lib
-, numpy
-, scipy
-, pandas
-, matplotlib
-, cartopy }:
-
-buildPythonPackage rec {
-  pname = "pymagglobal";
-  version = "0.1.0";
-  format = "other";
-  src = ./.;
-
-  installPhase = ''
-    export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
-
-    ${python}/bin/${python.executable} setup.py install \
-      --install-lib=$out/lib/${python.libPrefix}/site-packages \
-      --prefix="$out"
-  '';
-
-
-
-  propagatedBuildInputs = [
-    numpy
-    scipy
-    pandas
-    matplotlib
-    cartopy
-  ];
-
-  meta = with lib; {
-    description = "Python interface for global geomagnetic field models.";
-    license = licenses.lgpl3;
-    maintainers = [ maintainers.arthus ];
-  };
-
-}

shell.nix

-# This file complements pymagglobal.
-#
-# It is licensed under CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/)
-
-{ pkgs ? import
-    (builtins.fetchTarball {
-      name = "nixpkgs-20.09";
-      url = "https://github.com/NixOS/nixpkgs/archive/edb26126d98bc696f4f3e206583faa65d3d6e818.tar.gz";
-      sha256 = "1cl4ka4kk7kh3bl78g06dhiidazf65q8miyzaxi9930d6gwyzkci";
-    })
-    {
-      overlays = [
-        (self: super:
-
-          rec {
-            python37 = super.python37.override
-              {
-                packageOverrides = self: super: {
-
-                  matplotlib = super.matplotlib.overrideAttrs
-                    (oldAttrs: rec {
-                      version = "3.2.1";
-                      src = super.fetchPypi
-                        {
-                          inherit version;
-                          inherit (oldAttrs) pname;
-                          sha256 = "ffe2f9cdcea1086fc414e82f42271ecf1976700b8edd16ca9d376189c6d93aee";
-                        };
-                    });
-
-                  pymagglobal = super.callPackage ./pymagglobal.nix { };
-
-                };
-
-
-
-              };
-            python37Packages = python37.pkgs;
-          }
-
-
-
-        )
-      ];
-    }
-}:
-pkgs.mkShell {
-  buildInputs = with pkgs.python37Packages;
-    [ pymagglobal cartopy matplotlib numpy scipy ];
-}