anchor.diff:  
     ocropus = callPackage ../applications/misc/ocropus { };
   
  -  octopus = callPackage ../applications/science/chemistry/octopus { openblas=openblasCompat; };
  -
     inherit (callPackages ../development/interpreters/perl {}) perl perl522 perl524 perl526;
   
     pachyderm = callPackage ../applications/networking/cluster/pachyderm { };
  
positive.code: 
    ### SCIENCE
  
    ### SCIENCE/GEOMETRY
  
    drgeo = callPackage ../applications/science/geometry/drgeo {
  
negative.code: 
    gvolicon = callPackage ../tools/audio/gvolicon {};
  
    gzip = callPackage ../tools/compression/gzip { };
  
    gzrt = callPackage ../tools/compression/gzrt { };
  