Thanks. So I installed the source for libcrypt-devel using the CygWin installer. I then found I had to further install Math::Int64, Net::SSH::perl, and Crypt::PRNG. Once all that was done, I could install Net::SSH2 and then Net::SFTP. Everything seemed to make, make test, and make install successfully with all of that. I run my script, and it still says "Can't locate Net/SFTP.pm in @INC (you may need to install the Net::SFTP module)" This seems strange to me, given that it seems successfully installed Net::SFTP. Any ideas? Thanks again.