have tf test also use package

Signed-off-by: Kiara Grouwstra <kiara@procolix.eu>

deployment/check/data-model-tf/nixosTest.nix

@@ -15,12 +15,12 @@ let
       "ServerAliveInterval=1"
     ];
   };
-  deployment =
+  deploy =
     (import ../common/data-model.nix {
       inherit system;
       config = deployment-config;
       # opt not to pass `inputs`, as we could only pass serializable arguments through to its self-call
-    })."tf-deployment".tf-host;
+    })."tf-deployment".tf-host.run;
 in
 {
   _class = "nixosTest";
@@ -39,6 +39,7 @@ in
       environment.systemPackages = with pkgs; [
         (pkgs.callPackage ../../run/tf-single-host/tf.nix { })
         jq
+        deploy
       ];
 
       # needed only when building from deployer
@@ -57,7 +58,7 @@ in
 
     with subtest("ssh: Run the deployment"):
       deployer.succeed("""
-        ${deployment.run}
+        ${lib.getExe deploy}
       """)
       target.wait_for_unit("multi-user.target")
       target.succeed("su - operator -c hello 1>&2")

deployment/data-model.nix

@@ -186,7 +186,7 @@ let
             type = types.path;
           };
           run = mkOption {
-            type = types.str;
+            type = types.package;
             # error: The option `tf-deployment.tf-host.run' is read-only, but it's set multiple times.
             # readOnly = true;
             default =
@@ -221,7 +221,7 @@ let
                 };
                 tf-env = pkgs.callPackage ./run/tf-single-host/tf-env.nix { };
               in
-              ''
+              pkgs.writeShellScriptBin "deploy-ssh.sh" ''
                 env ${toString (lib.mapAttrsToList (k: v: "TF_VAR_${k}=\"${toBash v}\"") environment)} \
                 tf_env=${tf-env} bash ./deployment/run/tf-single-host/run.sh
               '';