diff --git a/nixos/modules/services/security/e-imzo.nix b/nixos/modules/services/security/e-imzo.nix
index d710cc9ac012..ed0fae3c7ad0 100644
--- a/nixos/modules/services/security/e-imzo.nix
+++ b/nixos/modules/services/security/e-imzo.nix
@@ -38,6 +38,13 @@ in
         Type = "simple";
         Restart = "always";
         RestartSec = 1;
+        ExecStartPre = [
+          (pkgs.writeShellScript "e-imzo-check-port-availability" ''
+            until [ -z "$(${pkgs.iproute2}/bin/ss -tuln | grep -E ':(64646|64443)\>')" ]; do
+              sleep 1
+            done
+          '')
+        ];
         ExecStart = lib.getExe cfg.package;
 
         NoNewPrivileges = true;