проблема libpng-1.2.26.tar.lzma

всем привет...
помогите пожалуйста разобраться..
устонавливаю xorg-x11

>>> Unpacking source...
>>> Unpacking libpng-1.2.26.tar.lzma to /var/tmp/portage/media-libs/libpng-1.2.26-r1/work
unpack libpng-1.2.26.tar.lzma: file format not recognized. Ignoring.
/usr/portage/media-libs/libpng/libpng-1.2.26-r1.ebuild: line 22: cd: /var/tmp/portage/media-libs/libpng-1.2.26-r1/work/libpng-1.2.26: нет такого файла или католога
* Applying libpng-1.2.24-pngconf-setjmp.patch ...

* Failed Patch: libpng-1.2.24-pngconf-setjmp.patch !
* ( /usr/portage/media-libs/libpng/files/libpng-1.2.24-pngconf-setjmp.patch )
*
* Include in your bugreport the contents of:
*
* /var/tmp/portage/media-libs/libpng-1.2.26-r1/temp/libpng-1.2.24-pngconf-setjmp.patch-3328.out

!!! ERROR: media-libs/libpng-1.2.26-r1 failed.
Call stack:
ebuild.sh, line 1614: Called dyn_unpack
ebuild.sh, line 751: Called qa_call 'src_unpack'
environment, line 3402: Called src_unpack
libpng-1.2.26-r1.ebuild, line 23: Called epatch '/usr/portage/media-libs/libpng/files/libpng-1.2.24-pngconf-setjmp.patch'
eutils.eclass, line 324: Called die

!!! Failed Patch: libpng-1.2.24-pngconf-setjmp.patch!
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/media-libs/libpng-1.2.26-r1/temp/build.log'.

заранее огромное спасибо.