anchor.diff:      "sapFinder" # depends on broken package rTANDEM-1.9.0
       "saps" # broken build
       "SCAN_UPC" # depends on broken package affyio-1.37.0
  +    "scholar" # depends on broken package r-rvest-0.3.1
       "ScISI" # depends on broken package apComplex-2.35.0
       "scmamp" # broken build
       "scsR" # broken build
  
positive.code:     "pepStat" # broken build
      "pequod" # depends on broken package nlopt-2.4.2
      "PerfMeas" # broken build
      "permGPU" # build is broken
      "PGA" # depends on broken package Rsamtools-1.21.8
      "PGSEA" # depends on broken package annaffy-1.41.1
      "PharmacoGx"
  
negative.code:     tcltk2 = [ pkgs.tcl pkgs.tk ];
      tikzDevice = [ pkgs.which pkgs.texlive.combined.scheme-medium ];
      rPython = [ pkgs.which ];
      gridGraphics = [ pkgs.which ];
      gputools = [ pkgs.which pkgs.cudatoolkit ];
      adimpro = [ pkgs.which pkgs.xorg.xdpyinfo ];
      PET = [ pkgs.which pkgs.xorg.xdpyinfo pkgs.imagemagick ];
      dti = [ pkgs.which pkgs.xorg.xdpyinfo pkgs.imagemagick ];
  