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+---
+'@backstage/config-loader': minor
+---
+
+Add support for environment variable substitution in `$include` transform values.
+
+This change allows for including dynamic paths, such as environment specific secrets by using the same environment variable substitution already supported outside of the `$include` transform (`${..}`).
+
+If you are currently using the syntax `${...}` in your `$include` values, you will need to escape the substitution by using `$${...}` instead.