diff --git a/build/README.md b/build/README.md
index 1cf70c0..84f07aa 100644
--- a/build/README.md
+++ b/build/README.md
@@ -23,4 +23,9 @@
 
 - **compile.(bat|sh):** Compiles project under default configurations
 - **run.(bat|sh):** Compiles and runs the project under default configurations
-- **createRelease.(ps1|sh):** Compiles, publish and pack a release for a target runtime
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+- **createRelease.(ps1|sh):** Compiles, publish and pack a release for a target runtime
+- **libcvextern.sh:** Compiles and produces `libcvextern.so|dylib`
+   - This script is independent and can run outside UVtools project, it's an standard alone script
+   - Required when:
+      - Your system is not included in UVtools releases
+      - When lunch UVtools and got the error: `System.DllNotFoundException: unable to load shared library 'cvextern' or one of its dependencies`
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