No stix fonts?

/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
findfont: Font family ['STIXSizeOneSym'] not found. Falling back to Bitstream
Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
findfont: Font family ['STIXSizeThreeSym'] not found. Falling back to Bitstream
Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
findfont: Font family ['STIXSizeFourSym'] not found. Falling back to Bitstream
Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
findfont: Font family ['STIXSizeFiveSym'] not found. Falling back to Bitstream
Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
findfont: Font family ['STIXSizeTwoSym'] not found. Falling back to Bitstream
Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
findfont: Font family ['STIXNonUnicode'] not found. Falling back to Bitstream
Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))

But I have stix fonts installed
stix-pua-fonts-1.0.0-1.fc14.noarch
stix-variants-fonts-1.0.0-1.fc14.noarch
stix-fonts-doc-1.0.0-1.fc14.noarch
stix-sizes-fonts-1.0.0-1.fc14.noarch
stix-fonts-1.0.0-1.fc14.noarch
stix-integrals-fonts-1.0.0-1.fc14.noarch

What could be wrong?