I got it answered in stackoverflow How to use environment variables in a 
Jenkins pipeline job? 
<https://stackoverflow.com/questions/53212940/how-to-use-environment-variables-in-a-jenkins-pipeline-job>
 I 
just had to uncheck the "Lightweight checkout" box at the bottom of that 
block, and it worked!

Thanks!

On Thursday, November 8, 2018 at 2:53:03 PM UTC-5, Mark Waite wrote:
>
> That's a good clarification.  I believe there is a known bug that the git 
> plugin does not expand variable references in some of the configuration 
> fields.  
>
> Use a multibranch Pipeline instead, then you can let the Pipeline script 
> expand the variable, and you won't have a confusing mix of changes in the 
> history of the job.
>
> Mark Waite
>
> On Thu, Nov 8, 2018 at 12:23 PM ZillaYT <[email protected] <javascript:>> 
> wrote:
>
>> Just to be clear, this is the text box in the job configuration page 
>> where I want to use an environment variable.
>>
>> [image: Screen Shot 2018-11-08 at 1.37.35 PM.png]
>>
>>
>> On Thursday, November 8, 2018 at 2:19:06 PM UTC-5, ZillaYT wrote:
>>>
>>> It should work, but doesn't!
>>>
>>> I define my environment variable in Manage Jenkins->System 
>>> Configuration, Global Properties, Environment variables. I use the variable 
>>> in other jobs so I know the variable definition works!
>>>
>>> Thanks.
>>>
>>> On Thursday, November 8, 2018 at 12:45:18 PM UTC-5, Cuong Tran wrote:
>>>>
>>>> Where do you define your "environment variable"?   
>>>>
>>>> It should work as ${BRANCH_TO_BUILD} if you define BRANCH_TO_BUILD 
>>>> under global environment variables, folder, inside your pipeline, etc.
>>>>
>>>>
>>>> On Thursday, November 8, 2018 at 8:56:38 AM UTC-8, ZillaYT wrote:
>>>>>
>>>>> Someone suggested using ${env.branchToBuild}, so I tried 
>>>>> env.branchToBuild, 
>>>>> $env.branchToBuild, ${env.branchToBuild}, and "${env.branchToBuild}" 
>>>>> all to NO avail.
>>>>>
>>>>> On Thursday, November 8, 2018 at 10:26:34 AM UTC-5, ZillaYT wrote:
>>>>>>
>>>>>> I have a Jenkins Pipeline job which uses "Pipeline script from SCM" 
>>>>>> as my pipeline. One of this block's parameters is "Branch to build" of 
>>>>>> course. How can I used an environment variable for the text block? I 
>>>>>> tried, 
>>>>>> for example , $branchToBuild, ${branchToBuild} or "${branchToBuild}"  
>>>>>> and it just takes those as literal values and does not extrapolate the 
>>>>>> string. I do have that variable defined and use it in other jobs.
>>>>>>
>>>>>> Is it just not possible to do this?
>>>>>>
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>
>
> -- 
> Thanks!
> Mark Waite
>

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