diff --git a/lib/README.md b/lib/README.md
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+# civix: Mixin Libraries
+
+## Generate an update
+
+Consider `civimix-schema@X.X.X.phar`, which is generated from `civicrm-core:mixin/lib/civimix-schema`.
+
+Suppose a new version (`Y.Y.Y`) is available upstream.
+
+Here's how to update the version civix:
+
+```bash
+## Export new lib
+cd CIVICRM_REPO
+./tools/mixin/bin/build-lib /tmp/civimix
+
+## Update civix: Remove old lib. Add new lib.
+cd CIVIX_REPO
+rm lib/civimix-schema@X.X.X.phar
+cp /tmp/civimix/civimix-schema@Y.Y.Y.phar lib/
+```
diff --git a/lib/civimix-schema@5.78.beta1.phar b/lib/civimix-schema@5.80.2.phar
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