Version 2.5.0-1 of expat libexpat-devel libexpat1 are available in the Cygwin distribution: CHANGES Latest upstream release https://github.com/libexpat/libexpat/blob/R_2_5_0/expat/Changes DESCRIPTION Stream-oriented XML parser library written in C. Expat excels with files too large to fit RAM, and where performance and flexibility are crucial. HOMEPAGE https://libexpat.github.io/ Marco Atzeri If you have questions or comments, please send them to the cygwin mailing list at: cygwin (at) cygwin (dot) com .