diff --git a/nix/templates/agent-base.nix b/nix/templates/agent-base.nix
index c633925..17262a7 100644
--- a/nix/templates/agent-base.nix
+++ b/nix/templates/agent-base.nix
@@ -15,6 +15,10 @@
     description = "hive-ag3nt harness";
     wantedBy = [ "multi-user.target" ];
     after = [ "network.target" ];
+    # The harness shells out to `claude` (turn loop + login flow). systemd
+    # units get a minimal PATH by default, so we have to put claude-code on
+    # it explicitly even though it's in environment.systemPackages above.
+    path = [ pkgs.claude-code ];
     serviceConfig = {
       ExecStart = "${pkgs.hyperhive}/bin/hive-ag3nt serve";
       Restart = "on-failure";
diff --git a/nix/templates/manager.nix b/nix/templates/manager.nix
index 7920ec4..13ad191 100644
--- a/nix/templates/manager.nix
+++ b/nix/templates/manager.nix
@@ -27,6 +27,9 @@
       HIVE_PORT = "8000";
       HIVE_LABEL = "hm1nd";
     };
+    # See note in agent-base.nix — `claude` has to be on the service PATH
+    # explicitly for the harness to shell out to it.
+    path = [ pkgs.claude-code ];
     serviceConfig = {
       ExecStart = "${pkgs.hyperhive}/bin/hive-m1nd serve";
       Restart = "on-failure";