anchor.diff:    ];
   
     configureFlags = [
  -    (enFlag "introspection" (gobject-introspection != null) null)
  +    "--${boolEn (gobject-introspection != null)}-introspection"
       "--disable-gtk-doc"
       "--disable-gtk-doc-html"
       "--disable-gtk-doc-pdf"
  
positive.code:     "--enable-rpath"
      "--enable-schemas-compile"
      "--disable-gtk2"
      (enFlag "vala" (vala != null) null)
    ];
  
    CFLAGS = "-Wno-deprecated-declarations";
  
negative.code:         outputHash
          outputHashAlgo
          urls;
        sha1Urls =  map (n: "${n}.sha1") urls;
        pgpsigUrls = map (n: "${n}.asc") urls;
        pgpKeyFingerprint = "163EB 50119 225DB 3DF8F  49EA1 7ACBA 8DFA9 70E17";
        failEarly = true;
      };
    };
  
  