Since we upgraded to EnvInject v1.30 we don't get our variable set if they are dependend on ${WORKSPACE}.
Please check the job log snippet:
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11:02:12 [EnvInject] - Preparing an environment for the job.
11:02:12 [EnvInject] - Jenkins system variables are kept.
11:02:12 [EnvInject] - Jenkins build variables are kept.
11:02:12 [EnvInject] - Injecting as environment variables the properties content
11:02:12 HOME=${WORKSPACE}\home\<USER>
11:02:12
11:02:12 [EnvInject] - Variables injected successfully.
11:02:12 [EnvInject] - Unset unresolved 'WORK_DRIVE' variable.
11:02:12 [EnvInject] - Unset unresolved 'HOME' variable.