Variable indirection in a pipeline?

[zil...@gmail.com]

In my Jenkins system configuration page, I have 3 variables defined, namely, sandbox_deployed, staging_deployed, and production_deployed. In my pipeline, I want to access one of these variables, based on a pipeline property, BUILD_ENV, defined in the job's configuration page. IOW, in my job's configuration page I have

BUILD_ENV=sandbox

How can I write pipeline code that does

println "$env.${env.BUILD_ENV}_deployed"

If I write it like in the above println, I get

org.jenkinsci.plugins.wo...@336841dd.sandbox_deployed

But I really want this

println "env.sandbox_deployed"

which prints out the correct value of the sandbox_deployed variable. What's the correct syntax?

[zil...@gmail.com]

It's

println "${env."${env.BUILD_ENV}_deployed"}"