How can I add an environment entry for _all_ project targets?

Question

In CLion (e.g. 2021.3), you can "Edit Configurations..." for project targets, and set environment variables (such as LD_LIBRARY_PATH). But - how can I append such variables for all targets in a project? (That is, other than manually adding them for each target, or setting the environment variable before running CLion, both of which I want to avoid)?