diff --git a/.forgejo/workflows/build-container-nix.yaml b/.forgejo/workflows/build-container-nix.yaml
index ad5687e..b5aab17 100644
--- a/.forgejo/workflows/build-container-nix.yaml
+++ b/.forgejo/workflows/build-container-nix.yaml
@@ -82,9 +82,10 @@ jobs:
               | sed 's/^ARG CONTAINER_APP_VERSION=//')
           fi
 
-          # Last resort: dagger call nix-version for nixpkgs packages (e.g. authentik)
+          # Last resort: nix eval for nixpkgs packages (e.g. authentik)
           if [ -z "$VERSION" ]; then
-            VERSION=$(dagger call nix-version --package="$CONTAINER")
+            VERSION=$(nix --extra-experimental-features "nix-command flakes" \
+              eval --raw "nixpkgs#${CONTAINER}.version")
           fi
 
           if [ -z "$VERSION" ]; then
diff --git a/nixos/ringtail/configuration.nix b/nixos/ringtail/configuration.nix
index ad26b5d..5a0035b 100644
--- a/nixos/ringtail/configuration.nix
+++ b/nixos/ringtail/configuration.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, lib, dagger-pkg, ... }:
+{ config, pkgs, lib, ... }:
 
 let
   # Libraries needed by mise-compiled runtimes (python-build, etc.)
@@ -500,7 +500,7 @@ in
       tokenFile = "/etc/forgejo-runner/token.env";
       labels = [ "nix-container-builder:host" ];
       hostPackages = with pkgs; [
-        bash coreutils curl dagger-pkg gawk gitMinimal gnused jq nodejs wget
+        bash coreutils curl gawk gitMinimal gnused jq nodejs wget
         nix skopeo
       ];
       settings = {
diff --git a/nixos/ringtail/flake.nix b/nixos/ringtail/flake.nix
index f3a5d61..70a1d73 100644
--- a/nixos/ringtail/flake.nix
+++ b/nixos/ringtail/flake.nix
@@ -3,10 +3,6 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
-    dagger = {
-      url = "github:dagger/nix";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
     disko = {
       url = "github:nix-community/disko";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -17,10 +13,9 @@
     };
   };
 
-  outputs = { nixpkgs, dagger, disko, home-manager, ... }: {
+  outputs = { nixpkgs, disko, home-manager, ... }: {
     nixosConfigurations.ringtail = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
-      specialArgs = { dagger-pkg = dagger.packages.x86_64-linux.dagger; };
       modules = [
         disko.nixosModules.disko
         home-manager.nixosModules.home-manager