anchor.diff:  { stdenv
   , fetchurl
  +, gettext
   , lib
  +, meson
  +, ninja
   , python3
   
   , aalib
  
positive.code:   };
  
    nativeBuildInputs = [
      python3
    ];
  
    buildInputs = [
  
negative.code:     libsoup
      v4l_lib
      libvpx
      libx11
      libxext
      orc
      speex
      taglib
      wavpack
      xextproto
      zlib
    ];
  
    mesonFlags = [
      "-Dv4l2-probe=${if v4l_lib != null then "true" else "false"}"
      "-Dwith-libv4l2=${if v4l_lib != null then "true" else "false"}"
      "-Duse_orc=yes"
    ];
  
    passthru = {
  