diff --git a/images/nix-flakes/default.nix b/images/nix-flakes/default.nix
index 00e9bfa..7bea3c9 100644
--- a/images/nix-flakes/default.nix
+++ b/images/nix-flakes/default.nix
@@ -1,10 +1,10 @@
 { docker-nixpkgs
-, nixFlakes
+, nixVersions
 , writeTextFile
 , extraContents ? [ ]
 }:
 docker-nixpkgs.nix.override {
-  nix = nixFlakes;
+  nix = nixVersions.stable;
   extraContents = [
     (writeTextFile {
       name = "nix.conf";
diff --git a/images/nix-unstable/default.nix b/images/nix-unstable/default.nix
index 008e7ec..792acc5 100644
--- a/images/nix-unstable/default.nix
+++ b/images/nix-unstable/default.nix
@@ -1,7 +1,6 @@
 { docker-nixpkgs
 , pkgs
-, nixUnstable
 }:
 docker-nixpkgs.nix.override {
-  nix = pkgs.nixVersions.latest or pkgs.nixUnstable;
+  nix = pkgs.nixVersions.latest;
 }