diff --git a/doc/stdenv/stdenv.chapter.md b/doc/stdenv/stdenv.chapter.md
index 166587d3284..bbd70162a7a 100644
--- a/doc/stdenv/stdenv.chapter.md
+++ b/doc/stdenv/stdenv.chapter.md
@@ -887,7 +887,7 @@ Packages may expect or require other utilities to be available at runtime.
 
 Use `--prefix` to explicitly set dependencies in `PATH`.
 
-:::{note}
+::: {.note}
 `--prefix` essentially hard-codes dependencies into the wrapper.
 They cannot be overridden without rebuilding the package.
 :::