How to set the PATH environment variable in Jenkins configuration on Windows?

Question

When I run my build process on Windows Server 2008, it fails with the error message like

Cannot run program \"foo\": CreateProcess: error=2, The syste

Answer 1

Couldn't get other it to work by the other answers. Ended up setting the variable in my slave node launcher (batch) script:

SET PATH=C:\cygwin64\bin;%PATH%
java -jar agent.jar -jnlpUrl ...