Promotion is an independent job type, which has its own environment. Several promotion-oriented build steps may need an environment or artifacts of the original builds, so they may call the TokenMacro resolution against the build.
In particular cases we're interested to support environment variables from both Promotion and original build. In such case it would be great to have a PROMOTION_ENV macro, which finds the source promotion job by the current executor context. In such case ENV and PROMOTION_ENV macros will allow to extract variables from both jobs.