anchor.diff:    postPatch = ''
       substituteInPlace setup.py \
         --replace "apispec[yaml]>=3.3, <4" "apispec[yaml] >=3.3" \
  -      --replace "Flask>=0.12, <2" "Flask" \
  -      --replace "Flask-Login>=0.3, <0.5" "Flask-Login >=0.3, <0.6" \
  -      --replace "Flask-Babel>=1, <2" "Flask-Babel >=1, <3" \
  +      --replace "Flask-Login>=0.3, <0.5" "Flask-Login >=0.3" \
         --replace "Flask-WTF>=0.14.2, <0.15.0" "Flask-WTF" \
         --replace "WTForms<3.0.0" "WTForms" \
         --replace "marshmallow-sqlalchemy>=0.22.0, <0.27.0" "marshmallow-sqlalchemy" \
  -      --replace "Flask-JWT-Extended>=3.18, <4" "Flask-JWT-Extended>=4.1.0" \
  -      --replace "PyJWT>=1.7.1, <2.0.0" "PyJWT>=2.0.1" \
  -      --replace "prison>=0.2.1, <1.0.0" "prison" \
  -      --replace "SQLAlchemy<1.4.0" "SQLAlchemy"
  +      --replace "prison>=0.2.1, <1.0.0" "prison"
     '';
   
     # Majority of tests require network access or mongo
  
positive.code:   src = fetchPypi {
      pname = "Flask-AppBuilder";
      inherit version;
      sha256 = "sha256-uZzuvNusqMzAS/vmg3CuZ+D442J4LbFwsBboVIx/srE=";
    };
  
    # See here: https://github.com/dpgaspar/Flask-AppBuilder/commit/7097a7b133f27c78d2b54d2a46e4a4c24478a066.patch
    #           https://github.com/dpgaspar/Flask-AppBuilder/pull/1610
    # The patch from the PR doesn't apply cleanly so I edited it manually.
    patches = [
      ./upgrade-to-flask_jwt_extended-4.patch
      (fetchpatch {
        # https://github.com/dpgaspar/Flask-AppBuilder/pull/1734
        name = "flask-appbuilder-wtf3.patch";
  
negative.code: 
  buildPythonPackage rec {
    pname = "flask-appbuilder";
    version = "4.0.0";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  