nixos/test/docker-tools: fix Nix image digest

nixos/tests/docker-tools.nix

@@ -34,8 +34,8 @@ import ./make-test.nix ({ pkgs, ... }: {
 
       # To test the pullImage tool
       $docker->succeed("docker load --input='${pkgs.dockerTools.examples.nixFromDockerHub}'");
-      $docker->succeed("docker run --rm nixos/nix:1.11 nix-store --version");
-      $docker->succeed("docker rmi nixos/nix:1.11");
+      $docker->succeed("docker run --rm nixos/nix:2.2.1 nix-store --version");
+      $docker->succeed("docker rmi nixos/nix:2.2.1");
 
       # To test runAsRoot and entry point
       $docker->succeed("docker load --input='${pkgs.dockerTools.examples.nginx}'");

pkgs/build-support/docker/examples.nix

@@ -87,9 +87,9 @@ rec {
   # 4. example of pulling an image. could be used as a base for other images
   nixFromDockerHub = pullImage {
     imageName = "nixos/nix";
-    imageDigest = "sha256:20d9485b25ecfd89204e843a962c1bd70e9cc6858d65d7f5fadc340246e2116b";
-    sha256 = "0mqjy3zq2v6rrhizgb9nvhczl87lcfphq9601wcprdika2jz7qh8";
-    finalImageTag = "1.11";
+    imageDigest = "sha256:85299d86263a3059cf19f419f9d286cc9f06d3c13146a8ebbb21b3437f598357";
+    sha256 = "0vnp3mhpk4ny3xa3cgngqsargnmvfgld54d5sn4b5av6yqzzp67z";
+    finalImageTag = "2.2.1";
   };
 
   # 5. example of multiple contents, emacs and vi happily coexisting