anchor.diff:  # Tag support
   , libid3tag
   , nixosTests
  +# For documentation
  +, doxygen
  +, python3Packages # for sphinx-build
   # For tests
   , gtest
   , fetchpatch # used to fetch an upstream patch fixing a failing test
  
positive.code: 
        mesonAutoFeatures = "disabled";
  
        mesonFlags = [
          "-Dtest=true"
        ]
          ++ map (x: "-D${x}=enabled") features_
  
negative.code:         meson
          ninja
          pkg-config
          python3Packages.sphinx
          doxygen
        ];
  
        # Otherwise, the meson log says:
  