diff --git a/flake.lock b/flake.lock
index fea6cc8..62f76da 100644
--- a/flake.lock
+++ b/flake.lock
@@ -18,11 +18,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1654230545,
-        "narHash": "sha256-8Vlwf0x8ow6pPOK2a04bT+pxIeRnM1+O0Xv9/CuDzRs=",
+        "lastModified": 1656372800,
+        "narHash": "sha256-1u9SDLXvKix/QejNb2sY2J2QZXnbe/14MnLtn+ln9j0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "236cc2971ac72acd90f0ae3a797f9f83098b17ec",
+        "rev": "020c74014b9e2fa905bb4059c979965816cd9118",
         "type": "github"
       },
       "original": {
@@ -42,16 +42,16 @@
     },
     "stable": {
       "locked": {
-        "lastModified": 1653996475,
-        "narHash": "sha256-r/UA7h3Dfgf4dlOCkakpqejf1Tagfb+6T+9OdT0qBgU=",
+        "lastModified": 1656433693,
+        "narHash": "sha256-m29hSYsu2U+tnBo5v1/2RGo3lYY6KKb52MHV/89NeCs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ec6eaba9dfcfdd11547d75a193e91e26701bf7e3",
+        "rev": "babb041b7167008af3faca4c78f9dd8c6e83ef3a",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-21.11",
+        "ref": "nixos-22.05",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 1bf1ee4..0ab785f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,7 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    stable.url = "github:NixOS/nixpkgs/nixos-21.11";
+    stable.url = "github:NixOS/nixpkgs/nixos-22.05";
 
     utils.url = "github:numtide/flake-utils";
 
diff --git a/integration-tests/tools.nix b/integration-tests/tools.nix
index 5527fa0..a165ef2 100644
--- a/integration-tests/tools.nix
+++ b/integration-tests/tools.nix
@@ -148,9 +148,11 @@ let
       deployer.succeed("ln -sf ${pkgs.path} /nixpkgs")
       deployer.succeed("mkdir -p /root/.ssh && touch /root/.ssh/id_rsa && chmod 600 /root/.ssh/id_rsa && cat ${sshKeys.snakeOilPrivateKey} > /root/.ssh/id_rsa")
 
+      ${lib.optionalString (length targets != 0) ''
       for node in ${targetList}:
           node.wait_for_unit("sshd.service")
           deployer.succeed(f"ssh -o StrictHostKeyChecking=accept-new {node.name} true", timeout=30)
+      ''}
 
       deployer.succeed("cp --no-preserve=mode -r ${bundle} /tmp/bundle && chmod u+w /tmp/bundle")