diff --git a/README.md b/README.md
index 9893a1f..776d104 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,7 @@ set -g theme_display_docker_machine no
 set -g theme_display_k8s_context yes
 set -g theme_display_hg yes
 set -g theme_display_virtualenv no
+set -g theme_display_nix no
 set -g theme_display_ruby no
 set -g theme_display_nvm yes
 set -g theme_display_user ssh
diff --git a/fish_prompt.fish b/fish_prompt.fish
index dd209a0..504ed2c 100644
--- a/fish_prompt.fish
+++ b/fish_prompt.fish
@@ -31,6 +31,7 @@
 #     set -g theme_display_k8s_namespace no
 #     set -g theme_display_hg yes
 #     set -g theme_display_virtualenv no
+#     set -g theme_display_nix no
 #     set -g theme_display_ruby no
 #     set -g theme_display_user ssh
 #     set -g theme_display_hostname ssh