anchor.diff:  { lib, stdenv, fetchFromGitHub, flex, bison, pkg-config, zlib, libtiff, libpng, fftw
  -, cairo, readline, ffmpeg, makeWrapper, wxGTK30, netcdf, blas
  +, cairo, readline, ffmpeg, makeWrapper, wxGTK30, wxmac, netcdf, blas
   , proj, gdal, geos, sqlite, postgresql, libmysqlclient, python3Packages, libLAS, proj-datumgrid
   , zstd, pdal, wrapGAppsHook
   }:
  
positive.code:     "--with-zstd"
      "--with-fftw"
      "--with-pthread"
    ];
  
    # Otherwise a very confusing "Can't load GDAL library" error
  
negative.code:   configureFlags = [
      "--with-proj-share=${proj}/share/proj"
      "--with-proj-includes=${proj.dev}/include"
      "--with-proj-libs=${proj}/lib"
      "--without-opengl"
      "--with-readline"
      "--with-wxwidgets"
      "--with-netcdf"
      "--with-geos"
      "--with-postgres"
      "--with-postgres-libs=${postgresql.lib}/lib/"
  