diff --git a/nixos/modules/services/networking/shellhub-agent.nix b/nixos/modules/services/networking/shellhub-agent.nix
index ce0a6d99927..4ec59754bfb 100644
--- a/nixos/modules/services/networking/shellhub-agent.nix
+++ b/nixos/modules/services/networking/shellhub-agent.nix
@@ -80,11 +80,13 @@ in
         "time-sync.target"
       ];
 
-      environment.SHELLHUB_SERVER_ADDRESS = cfg.server;
-      environment.SHELLHUB_PRIVATE_KEY = cfg.privateKey;
-      environment.SHELLHUB_TENANT_ID = cfg.tenantId;
-      environment.SHELLHUB_PREFERRED_HOSTNAME = cfg.preferredHostname;
-      environment.SHELLHUB_KEEPALIVE_INTERVAL = toString cfg.keepAliveInterval;
+      environment = {
+        SHELLHUB_SERVER_ADDRESS = cfg.server;
+        SHELLHUB_PRIVATE_KEY = cfg.privateKey;
+        SHELLHUB_TENANT_ID = cfg.tenantId;
+        SHELLHUB_KEEPALIVE_INTERVAL = toString cfg.keepAliveInterval;
+        SHELLHUB_PREFERRED_HOSTNAME = cfg.preferredHostname;
+      };
 
       serviceConfig = {
         # The service starts sessions for different users.