== Steps to reproduce ==

• Install Linux Master.
• Install Windows/Cygwin Slave and start SSH server.
• Connect the slave to Jenkins master.
• Configure slave's to use POSIX-style path for jenkins, i.e.: /home/jenkins
• Start a dummy job (just to let Jenkins create WORKSPACE directory on the Slave).

== Expected Result ==

Jenkins creates directories under Windows/Cygwin installation: C:\cygwin64\home\jenkins

== Actual Result ==

Jenkins Slave simply appends C: to the POSIX path which results in creating this directory (in the root of the drive): C:\home\jenkins

== Other notes ==

1. The issue is related to JENKINS-21770. It is considered solved, but it's not: there is just a workaround to use Windows-style paths instead of POSIX ones. Why would anyone need "Cygpath Plugin" if configuration still have to use Windows-style paths?

2. The problem goes on. Environment variables like WORKSPACE are still pushed in its Windows-style: C:\home\jenkins\workspace\JOB_NAME which breaks Cygwin shell scripts.

3. In fact, there is no apparent improvements before and after installing "Cygpath Plugin".
What it supposed to solve then?
Or is there an example to prove it actually works?