diff --git a/flake.nix b/flake.nix
index 5f85832..bc0e7b1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -40,6 +40,7 @@
           ldflags = [
             "-s"
             "-w"
+            "-X github.com/caddyserver/caddy/v2.CustomVersion=${version}"
           ];
 
           nativeBuildInputs = [pkgs.installShellFiles];