diff --git a/nix/README.rst b/nix/README.rst
index 9cf5902c2..4a1a8f515 100644
--- a/nix/README.rst
+++ b/nix/README.rst
@@ -21,7 +21,10 @@ This sets up an environment suitable for using ARTIQ, including the ARTIQ-Python
 
 * ``$ nix-channel --add https://nixbld.m-labs.hk/project/artiq/channel/latest m-labs``
 * ``$ nix-channel --update``
-* create the file ``~/.config/nix/nix.conf`` with the following content: ::
+* create the file ``~/.config/nix/nix.conf`` with the following content:
+
+::
+
   substituters = https://cache.nixos.org https://nixbld.m-labs.hk
   trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc=\