diff --git a/README.adoc b/README.adoc
index ec5fceb..54e5a74 100644
--- a/README.adoc
+++ b/README.adoc
@@ -55,7 +55,7 @@ because it defaults to some arbitrary background color.
 To build the images with https://nixos.wiki/wiki/Nix_Installation_Guide[`nix`],
 run:
 
-,bash]
+[bash]
 ----
 nix build
 ----