diff --git a/README.md b/README.md
index 52abff1..1c2d644 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,8 @@ ending in `.nix` generally. See more details in [the source code
 README.](./2024/nix/README.md)
 
 I (and the license) do not grant permission for my work being passed off as
-someone else's (perhaps for the purpose of plagiarism).
+someone else's (perhaps for the purpose of plagiarism). Obviously this does not
+extend to the Nix source code, which is in the public domain.
 
 ## Typst compilation infrastructure