anchor.diff:    ### Deprecated aliases - for backward compatibility
   
   mapAliases ({
  -  blockdiagcontrib-cisco = throw "blockdiagcontrib-cisco is not compatible with blockdiag 2.0.0 and has been removed."; # Added 2020-11-29
  +  blockdiagcontrib-cisco = throw "blockdiagcontrib-cisco is not compatible with blockdiag 2.0.0 and has been removed."; # added 2020-11-29
     bt_proximity = bt-proximity; # added 2021-07-02
  -  bugseverywhere = throw "bugseverywhere has been removed: Abandoned by upstream."; # Added 2019-11-27
  +  bugseverywhere = throw "bugseverywhere has been removed: Abandoned by upstream."; # added 2019-11-27
     class-registry = phx-class-registry; # added 2021-10-05
     ConfigArgParse = configargparse; # added 2021-03-18
     dateutil = python-dateutil; # added 2021-07-03
     detox = throw "detox is no longer maintained, and was broken since may 2019"; # added 2020-07-04
  -  dftfit = throw "it's dependency lammps-cython no longer builds";
  +  dftfit = throw "it's dependency lammps-cython no longer builds"; # added 2021-07-04
     diff_cover = diff-cover; # added 2021-07-02
     discogs_client = discogs-client; # added 2021-07-02
  -  djangorestframework-jwt = drf-jwt;
  -  dns = dnspython; # Alias for compatibility, 2017-12-10
  +  djangorestframework-jwt = drf-jwt; # added 2021-07-20
  +  dns = dnspython; # added 2017-12-10
     dogpile_cache = dogpile-cache; # added 2021-10-28
  -  faulthandler = throw "faulthandler is built into ${python.executable}";
  +  faulthandler = throw "faulthandler is built into ${python.executable}"; # added 2021-07-12
     gitdb2 = throw "gitdb2 has been deprecated, use gitdb instead."; # added 2020-03-14
     glances = throw "glances has moved to pkgs.glances"; # added 2020-20-28
     google_api_python_client = google-api-python-client; # added 2021-03-19
  
positive.code:   lammps-cython = throw "no longer builds and is unmaintained";
    MechanicalSoup = mechanicalsoup; # added 2021-06-01
    pam = python-pam; # added 2020-09-07.
    PasteDeploy = pastedeploy;
    powerlineMemSegment = powerline-mem-segment;
    privacyidea = throw "renamed to pkgs.privacyidea"; # added 2021-06-20
    prometheus_client = prometheus-client; # added 2021-06-10
    prompt_toolkit = prompt-toolkit;
    pylibgen = throw "pylibgen is unmaintained upstreamed, and removed from nixpkgs"; # added 2020-06-20
    pymssql = throw "pymssql has been abandoned upstream."; # added 2020-05-04
    pysmart-smartx = pysmart; # added 2021-10-22
  
negative.code:   requests_toolbelt = requests-toolbelt; # added 2017-09-26
    rotate-backups = throw "pythonPackages.rotate-backups was removed in favor of the top-level rotate-backups"; # added 2021-07-01
    scikitlearn = scikit-learn; # added 2021-07-21
    selectors34 = throw "selectors34 has been removed: functionality provided by Python itself; archived by upstream."; # added 2021-06-10
    setuptools_scm = setuptools-scm; # added 2021-06-03
    smart_open = smart-open; # added 2021-03-14
    smmap2 = throw "smmap2 has been deprecated, use smmap instead."; # added 2020-03-14
    sphinxcontrib_plantuml = sphinxcontrib-plantuml; # added 2021-08-02
    sqlalchemy_migrate = sqlalchemy-migrate; # added 2021-10-28
    topydo = throw "python3Packages.topydo was moved to topydo"; # added 2017-09-22
    tvnamer = throw "python3Packages.tvnamer was moved to tvnamer"; # added 2021-07-05
    WazeRouteCalculator = wazeroutecalculator; # added 2021-09-29
    websocket_client = websocket-client; # added 2021-06-15
    zc-buildout221 = zc-buildout; # added 2021-07-21
  })
  