anchor.diff:      "--${boolEn (speex != null)}-libspeex"
       /**/(fflag "--disable-libsrt" "4.0")
       "--${boolEn (libssh != null)}-libssh"
  +    /**/(fflag "--disable-libtensorflow" "4.1")
       #"--${boolEn (tesseract != null)}-libtesseract"
       /**/"--disable-libtesseract"
       "--${boolEn (libtheora != null)}-libtheora"
  
positive.code:     };
      "9.9" = {  # Git
        fetchzipversion = 6;
        version = "2018.05.10";
        rev = "974eb4aaaa7d96a996c61030fca4095c3c2c6284";
        sha256 = "a91659bba6197e0f44768965b9afa240c33bffc85c2c1a38e15597799d0c3b81";
      };
    };
    source = sources."${channel}";
  
negative.code:     #"--${boolEn (libcdio != null)}-libcdio"
      /**/"--disable-libcdio"
      /**/(fflag "--disable-libcodec2" "4.0")
      /**/(fflag "--disable-libdavs2" "4.1")
      "--${boolEn (
        libdc1394 != null
        && libraw1394 != null)}-libdc1394"
  