try to fix github action

Author: pnavaro

.github/workflows/book.yml

@@ -24,6 +24,8 @@ jobs:
 
     - name: Install PyCall
       shell: bash -l {0}
+      env:
+          PYTHON: ""
       run: |
         julia -e ' using Pkg; Pkg.update() '
         julia -e ' using Pkg; Pkg.add(["REPL", "PyCall"]); Pkg.build("PyCall")'

environment.yml

@@ -3,23 +3,22 @@ channels:
   - conda-forge
 dependencies:
   - python=3.9
-  - jupytext
   - cython
   - fortran-magic
+  - fftw
   - gast
   - imageio
   - ipykernel
   - ipywidgets
-  - llvmlite
-  - pyjulia
+  - jupytext
+  - jupyter-book
   - matplotlib
   - meson
   - numba
   - numpy
   - pillow
+  - pyjulia
   - pythran
+  - scipy
   - seaborn
   - tqdm
-  - fftw
-  - scipy
-  - jupyter-book