liblzma-dev 4.999.8beta-0ubuntu1 (armel binary) in ubuntu karmic

 liblzma is an encoder/decoder library with support for several
 filters (algorithm implementations). The primary filter is LZMA2,
 an extended version of the compression method used in lzma and 7-Zip.
 This package includes the development support files.
 .
 This library does not support 7-Zip's LZMA-based .7z format (for
 that, see p7zip). This library's native file format is .xz, but the
 old .lzma format and raw (no headers) streams are also supported.
 .
 Compression is generally good (on par with or better than bzip2),
 decompression fast, and RAM usage high during compression and low
 during decompression.