anchor.diff:      adwaita-icon-theme enchant2 gcr gmime gnome-online-accounts
       gsettings-desktop-schemas gtk3 isocodes json-glib libcanberra-gtk3
       libgee libnotify libsecret sqlite webkitgtk glib-networking
  -    libunwind
  +    libunwind folks
     ];
   
     checkInputs = [ xvfb_run dbus ];
  
positive.code:     xvfb-run -s '-screen 0 800x600x24' dbus-run-session \
        --config-file=${dbus.daemon}/share/dbus-1/session.conf \
        meson test -v --no-stdsplit
    '';
  
    passthru = {
  
negative.code:   postPatch = ''
      chmod +x build-aux/post_install.py
      patchShebangs build-aux/post_install.py
  
      chmod +x desktop/geary-attach
    '';
  
    doCheck = true;
  