anchor.diff:      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 ];
  
positive.code:     "rjags" # broken build
      "proteoQC" # depends on broken package rTANDEM
      "PGA" # depends on broken package rTANDEM
      "cudatoolkit" # broken build
      "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
      "nlopt" # broken build
      "stpm" # depends on broken package nloptr
      "sjmisc" # depends on broken package nloptr
      "rstanarm" # depends on broken package nloptr
  
negative.code: 
    # 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
  