howto show what package provides a dep?

[Neal Becker]

smart query --requires libsysfs.so.1 
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directfb-0.9.24-5.fc5 at i386
  Requires:
    libsysfs.so.1
libibverbs-1.0.1-1.fc5 at i386
  Requires:
    libsysfs.so.1
libibverbs-1.0.3-1.fc5 at i386
  Requires:
    libsysfs.so.1
libibverbs-utils-1.0.1-1.fc5 at i386
  Requires:
    libsysfs.so.1
libibverbs-utils-1.0.3-1.fc5 at i386
  Requires:
    libsysfs.so.1
mozilla-vlc-0.8.4a-1.lvn5 at i386
  Requires:
    libsysfs.so.1
vlc-0.8.4a-1.lvn5 at i386
  Requires:
    libsysfs.so.1

OK, so what provides libsysfs.so.1?
smart query --provides libsysfs.so.1
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[silence...]

What's wrong here?