anchor.diff:      langInputs = [ en ];
   
       buildPhase = ''
  +      runHook preBuild
         cat $src1 | aspell-plain en_US-science --dont-validate-words --lang=en
         cat $src2 | aspell-plain en_GB-science --dont-validate-words --lang=en
  +      runHook postBuild
       '';
       installPhase = "aspell-install en_US-science en_GB-science";
   
  
positive.code: 
      langInputs = [ en ];
  
      buildPhase = "cat $src | aspell-affix en-computers --dont-validate-words --lang=en";
      installPhase = "aspell-install en-computers";
  
      meta = {
  
negative.code:         }
        '';
  
        dontUnpack = true;
      } // args);
  
  in rec {
  