anchor.diff:      };
     };
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "Library to handle input devices";
       homepage = http://www.freedesktop.org/wiki/Software/libinput;
       license = licenses.mit;
  
positive.code:     valgrind
    ];
  
    configureFlags = [
      "--${boolEn documentationSupport}-documentation"
      "--${boolEn debugGUISupport}-debug-gui"
      "--${boolEn testsSupport}-tests"
    ];
  
    passthru = {
  
negative.code: , systemd_lib
  
  , documentationSupport ? false
    , doxygen
    , graphviz
   # GUI debug viewer support
  , debugGUISupport ? false
    , cairo
    , glib
    , gtk3
  , testsSupport ? false
    , check
    , valgrind
  }:
  
  let
    inherit (lib)
      boolTf
      optionals;
  in
  
  