anchor.diff:  
     # Packages which cannot be installed due to lack of dependencies or other reasons.
     brokenPackages = [
  +    "spoccutils" # depends on broken package spocc
  +    "mapr" # depends on broken package spocc
       "vmsbase" # broken build
       "vcfR" # broken build
       "strataG" # broken build
  
positive.code:     ShortRead = [ pkgs.zlib ];
      oligo = [ pkgs.zlib ];
      gmapR = [ pkgs.zlib ];
      ncdf = [ pkgs.netcdf ];
      Rsubread = [ pkgs.zlib ];
      SemiCompRisks = [ pkgs.gsl_1 ];
      XVector = [ pkgs.zlib ];
      Rsamtools = [ pkgs.zlib ];
      rtracklayer = [ pkgs.zlib ];
  
negative.code:     "rjags" # broken build
      "proteoQC" # depends on broken package rTANDEM
      "PGA" # depends on broken package rTANDEM
      "MBESS" # depends on broken package OpenMx
      "IONiseR" # depends on broken package rhdf5
      "DOQTL" # depends on broken package rhdf5
      "DmelSGI" # depends on broken package rhdf5
      "flowDiv" # depends on broken package ncdfFlow
      "ChemmineDrugs" # depends on broken package ChemmineR
      "stpm" # depends on broken package nloptr
      "sjmisc" # depends on broken package nloptr
      "rstanarm" # depends on broken package nloptr
  