anchor.diff:      nspr udev
       (if useOpenSSL then openssl else nss)
       utillinux alsaLib
  -    gcc bison gperf
  -    krb5 file
  +    gcc bison gperf krb5
       glib gtk dbus_glib
       libXScrnSaver libXcursor libXtst mesa
       pciutils protobuf speechd libXdamage
  
positive.code:     ffmpeg_branding = "Chrome";
    } // optionalAttrs (stdenv.system == "x86_64-linux") {
      target_arch = "x64";
    } // optionalAttrs (stdenv.system == "i686-linux") {
      target_arch = "ia32";
    });
  
    configurePhase = ''
  
negative.code: , libusb1, libexif, pciutils
  
  , python, pythonPackages, perl, pkgconfig
  , nspr, udev, krb5
  , utillinux, alsaLib
  , gcc, bison, gperf
  , glib, gtk, dbus_glib
  