anchor.diff:        --without-tcltk
         --without-aqua
         --disable-R-framework
  -      CC="clang"
  -      CXX="clang++"
         OBJC="clang"
     '' + ''
       )
  
positive.code:     pango pcre perl readline texLive xz zlib less texinfo graphviz icu
      pkgconfig bison imake which jdk openblas curl
    ] ++ stdenv.lib.optionals (!stdenv.isDarwin) [ tcl tk ]
      ++ stdenv.lib.optionals stdenv.isDarwin [ Cocoa Foundation cf-private libobjc ];
  
    patches = [ ./no-usr-local-search-paths.patch ];
  
    preConfigure = ''
      configureFlagsArray=(
  
negative.code:       --enable-R-shlib
        AR=$(type -p ar)
        AWK=$(type -p gawk)
        CC=$(type -p cc)
        CXX=$(type -p c++)
        FC="${gfortran}/bin/gfortran" F77="${gfortran}/bin/gfortran"
        JAVA_HOME="${jdk}"
        RANLIB=$(type -p ranlib)
  