diff --git a/src/py/flwr/cli/run/run.py b/src/py/flwr/cli/run/run.py
index 288cf0838a52..5db575abcb87 100644
--- a/src/py/flwr/cli/run/run.py
+++ b/src/py/flwr/cli/run/run.py
@@ -14,6 +14,7 @@
 # ==============================================================================
 """Flower command line interface `run` command."""
 
+import subprocess
 import sys
 from logging import DEBUG
 from pathlib import Path
@@ -29,7 +30,6 @@
 from flwr.common.logger import log
 from flwr.proto.exec_pb2 import StartRunRequest  # pylint: disable=E0611
 from flwr.proto.exec_pb2_grpc import ExecStub
-from flwr.simulation.run_simulation import _run_simulation
 
 
 # pylint: disable-next=too-many-locals
@@ -107,7 +107,7 @@ def run(
     if "address" in federation:
         _run_with_superexec(federation, directory, config_overrides)
     else:
-        _run_without_superexec(config, federation, federation_name)
+        _run_without_superexec(directory, federation, federation_name, config_overrides)
 
 
 def _run_with_superexec(
@@ -169,11 +169,11 @@ def on_channel_state_change(channel_connectivity: str) -> None:
 
 
 def _run_without_superexec(
-    config: Dict[str, Any], federation: Dict[str, Any], federation_name: str
+    app_path: Optional[Path],
+    federation: Dict[str, Any],
+    federation_name: str,
+    config_overrides: Optional[str],
 ) -> None:
-    server_app_ref = config["tool"]["flwr"]["app"]["components"]["serverapp"]
-    client_app_ref = config["tool"]["flwr"]["app"]["components"]["clientapp"]
-
     try:
         num_supernodes = federation["options"]["num-supernodes"]
     except KeyError as err:
@@ -188,8 +188,20 @@ def _run_without_superexec(
         )
         raise typer.Exit(code=1) from err
 
-    _run_simulation(
-        server_app_attr=server_app_ref,
-        client_app_attr=client_app_ref,
-        num_supernodes=num_supernodes,
+    command = [
+        "flower-simulation",
+        "--app",
+        f"{app_path}",
+        "--num-supernodes",
+        f"{num_supernodes}",
+    ]
+
+    if config_overrides:
+        command.extend(["--run-config", f"{config_overrides}"])
+
+    # Run the simulation
+    subprocess.run(
+        command,
+        check=True,
+        text=True,
     )