diff --git a/modules/core/networking.nix b/modules/core/networking.nix
index 435dc959..f6f754d7 100644
--- a/modules/core/networking.nix
+++ b/modules/core/networking.nix
@@ -82,6 +82,9 @@ in {
           ''
             help.local:80 {
               root * ${pkgs.psos-docs}/lib/html
+              # Caddy builds the etag with only the file size & latest modified
+              # date, which is always 1970-01-01 in the Nix store
+              header -ETag
               file_server
             }
           '')