anchor.diff:  
   , libexif
   , libgd
  -, libjpeg-turbo_1-4
  +, libjpeg-turbo
   #, libltdl
   , libusb
   , libxml2
  
positive.code:     "--enable-largefile"
      "--disable-internal-docs"
      "--disable-docs"
      "--${boolWt (libjpeg-turbo_1-4 != null)}-jpeg"
      "--with-camlibs=all"
    ];
  
  
negative.code:   buildInputs = [
      libexif
      libgd
      libjpeg-turbo
      libusb
      libxml2
      #lockdev
  