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-rw-r--r--doc/manual/src/protocols/derivation-aterm.md18
1 files changed, 14 insertions, 4 deletions
diff --git a/doc/manual/src/protocols/derivation-aterm.md b/doc/manual/src/protocols/derivation-aterm.md
index c9dc00ef7..e58b602a3 100644
--- a/doc/manual/src/protocols/derivation-aterm.md
+++ b/doc/manual/src/protocols/derivation-aterm.md
@@ -2,8 +2,18 @@
For historical reasons, [derivations](@docroot@/glossary.md#gloss-store-derivation) are stored on-disk in [ATerm](https://homepages.cwi.nl/~daybuild/daily-books/technology/aterm-guide/aterm-guide.html) format.
-Derivations are serialised in the following format:
+Derivations are serialised in one of the following formats:
-```
-Derive(...)
-```
+- ```
+ Derive(...)
+ ```
+
+ For all stable derivations.
+
+- ```
+ DrvWithVersion(<version-string>, ...)
+ ```
+
+ The only `version-string`s that are in use today are for [experimental features](@docroot@/contributing/experimental-features.md):
+
+ - `"xp-dyn-drv"` for the [`dynamic-derivations`](@docroot@/contributing/experimental-features.md#xp-feature-dynamic-derivations) experimental feature.