ググった。 MinGW - User - environment hosed during upgrade You can find such a manifest file on an archive of their mailing list: http://article.gmane.org/gmane.os.cygwin/84762 Could you try the following: 1) Copy the following files from some recent Cygwin installation (or create them based on the above link) to /bin in MSYS: patch.exe.manifest install.exe.manifest install-info.exe.manifest 2) Type "t