How do I manually install an old cygwin package?

Question

A project I am working on requires an old version of SLAPD (the LDAP server) and must run on Windows, hence I am using cygwin packages:

I\'ve found a binary package of

Answer 1

If you need an older version, the Cygwin time machine might help. To use it, I had to invoke setup.exe from the command line, giving it the --no-verify/-X option and it still wouldn't let me downgrade the "cygwin" package itself but at least it is, albeit very slowly, allowing me to install the version I wanted to test as a parallel installation.