diff --git a/nix/kubernetes/keys/package/k8s-encryption-key/package.nix b/nix/kubernetes/keys/package/k8s-encryption-key/package.nix
index 1f88575e..fcbbca1d 100644
--- a/nix/kubernetes/keys/package/k8s-encryption-key/package.nix
+++ b/nix/kubernetes/keys/package/k8s-encryption-key/package.nix
@@ -9,12 +9,28 @@
 # distPhase
 {
   lib,
+  pkgs,
   stdenv,
   runCommand,
   writeText,
   ...
 }:
 let
+  to_yaml_file =
+    file_name: contents:
+    let
+      settingsFormat = pkgs.formats.yaml { };
+      yaml_file = settingsFormat.generate file_name contents;
+    in
+    yaml_file;
+  to_yaml =
+    file_name: contents:
+    let
+      settingsFormat = pkgs.formats.yaml { };
+      yaml_file = settingsFormat.generate file_name contents;
+      yaml_content = builtins.readFile yaml_file;
+    in
+    yaml_content;
   kube_encryption_key = runCommand "kube_encryption_key" { } ''
     head -c 32 /dev/urandom | base64 | tee $out
   '';
@@ -40,9 +56,7 @@ let
       }
     ];
   };
-  kube_encryption_config_yaml = (
-    writeText "encryption-config.yaml" (lib.generators.toYAML { } kube_encryption_config)
-  );
+  kube_encryption_config_yaml = (to_yaml_file "encryption-config.yaml" kube_encryption_config);
 in
 stdenv.mkDerivation (finalAttrs: {
   name = "k8s-encryption-key";