anchor.diff:    pass-otp = throw "'pass-otp' has been renamed to/replaced by 'pass.withExtensions'"; # Converted to throw 2022-02-22
     pdfmod = throw "pdfmod has been removed"; # Added 2022-01-15
     pdfread = throw "pdfread has been remove because it is unmaintained for years and the sources are no longer available"; # Added 2021-07-22
  -  pdf-redact-tools = throw "pdf-redact-tools has been removed from nixpkgs because the upstream has abandoned the project."; # Added 2022-01-01
  +  pdf-redact-tools = throw "pdf-redact-tools has been removed from nixpkgs because the upstream has abandoned the project"; # Added 2022-01-01
     pdf2htmlEx = throw "pdf2htmlEx has been removed from nixpkgs, as it was unmaintained"; # Added 2020-11-03
     perlXMLParser = throw "'perlXMLParser' has been renamed to/replaced by 'perlPackages.XMLParser'"; # Converted to throw 2022-02-22
     perlArchiveCpio = throw "'perlArchiveCpio' has been renamed to/replaced by 'perlPackages.ArchiveCpio'"; # Converted to throw 2022-02-22
  
positive.code:   opensans-ttf = throw "'opensans-ttf' has been renamed to/replaced by 'open-sans'"; # Converted to throw 2022-02-22
    openssh_with_kerberos = throw "'openssh_with_kerberos' has been renamed to/replaced by 'openssh'"; # Converted to throw 2022-02-22
    orchis = orchis-theme; # Added 2021-06-09
    osquery = throw "osquery has been removed."; # Added 2019-11-24
    osxfuse = macfuse-stubs; # Added 2021-03-20
    otter-browser = throw "otter-browser has been removed from nixpkgs, as it was unmaintained"; # Added 2020-02-02
    owncloudclient = throw "'owncloudclient' has been renamed to/replaced by 'owncloud-client'"; # Converted to throw 2022-02-22
  
negative.code:   slurm-llnl = slurm; # renamed July 2017
    slurm-llnl-full = slurm-full; # renamed July 2017
    smbclient = throw "'smbclient' has been renamed to/replaced by 'samba'"; # Converted to throw 2022-02-22
    smugline = throw "smugline has been removed from nixpkgs, as it's unmaintained and depends on deprecated libraries"; # Added 2020-11-04
    solr_8 = solr; # Added 2021-01-30
  
    # Added 2020-02-10
  