anchor.diff:  
     ### Eclipse Modeling
   
  +  eclipse-modeling = eclipse-modeling-46; # always point to latest
  +
     eclipse-modeling-46 = buildEclipse {
       name = "eclipse-modeling-4.6";
       description = "Eclipse Modeling Tools";
  
positive.code: 
    ### Eclipse CPP
  
    eclipse-cpp-46 = buildEclipse {
      name = "eclipse-cpp-4.6.0";
      description = "Eclipse IDE for C/C++ Developers, Neon release";
  
negative.code: 
    ### Eclipse Platform
  
    eclipse-platform = eclipse-platform-46; # always point to latest
  
    eclipse-platform-46 = buildEclipse {
      name = "eclipse-platform-4.6.2";
  