diff --git a/checks/installation-without-system/flake-module.nix b/checks/installation-without-system/flake-module.nix
index cc58c8ad1..484c0671d 100644
--- a/checks/installation-without-system/flake-module.nix
+++ b/checks/installation-without-system/flake-module.nix
@@ -180,7 +180,7 @@
               self.packages.${pkgs.system}.clan-cli
             ] ++ self.packages.${pkgs.system}.clan-cli.runtimeDependencies;
             environment.etc."install-closure".source = "${closureInfo}/store-paths";
-            virtualisation.memorySize = 2048;
+            virtualisation.memorySize = 3048;
             nix.package = nixPackage;
             nix.settings = {
               substituters = lib.mkForce [ ];
diff --git a/checks/installation/flake-module.nix b/checks/installation/flake-module.nix
index 311c868ca..3b996d305 100644
--- a/checks/installation/flake-module.nix
+++ b/checks/installation/flake-module.nix
@@ -167,7 +167,7 @@
               self.packages.${pkgs.system}.clan-cli
             ] ++ self.packages.${pkgs.system}.clan-cli.runtimeDependencies;
             environment.etc."install-closure".source = "${closureInfo}/store-paths";
-            virtualisation.memorySize = 2048;
+            virtualisation.memorySize = 3048;
             nix.package = nixPackage;
             nix.settings = {
               substituters = lib.mkForce [ ];
diff --git a/lib/build-clan/module.nix b/lib/build-clan/module.nix
index 09cb69c3e..873ff56b5 100644
--- a/lib/build-clan/module.nix
+++ b/lib/build-clan/module.nix
@@ -96,12 +96,6 @@ let
 
               networking.hostName = lib.mkDefault name;
 
-              # speeds up nix commands by using the nixpkgs from the host system (especially useful in VMs)
-              nix.registry.nixpkgs.to = lib.mkDefault {
-                type = "path";
-                path = lib.mkDefault nixpkgs;
-              };
-
               # For vars we need to override the system so we run vars
               # generators on the machine that runs `clan vars generate`. If a
               # users is using the `pkgsForSystem`, we don't set
diff --git a/pkgs/clan-cli/tests/sshd.py b/pkgs/clan-cli/tests/sshd.py
index 1b9281a34..82c9c1251 100644
--- a/pkgs/clan-cli/tests/sshd.py
+++ b/pkgs/clan-cli/tests/sshd.py
@@ -10,13 +10,16 @@ from tempfile import TemporaryDirectory
 from typing import TYPE_CHECKING
 
 import pytest
-from fixture_error import FixtureError
 
 if TYPE_CHECKING:
     from command import Command
     from ports import PortFunction
 
 
+class SshdError(Exception):
+    pass
+
+
 class Sshd:
     def __init__(self, port: int, proc: subprocess.Popen[str], key: str) -> None:
         self.port = port
@@ -135,6 +138,10 @@ def sshd(
         extra_env=env,
     )
     monkeypatch.delenv("SSH_AUTH_SOCK", raising=False)
+
+    timeout = 5
+    start_time = time.time()
+
     while True:
         print(sshd_config.path)
         if (
@@ -162,5 +169,8 @@ def sshd(
             rc = proc.poll()
             if rc is not None:
                 msg = f"sshd processes was terminated with {rc}"
-                raise FixtureError(msg)
+                raise SshdError(msg)
+            if time.time() - start_time > timeout:
+                msg = "Timeout while waiting for sshd to be ready"
+                raise SshdError(msg)
             time.sleep(0.1)