diff --git a/utils/dependencies.py b/utils/dependencies.py
index 7dbb046..933be4b 100644
--- a/utils/dependencies.py
+++ b/utils/dependencies.py
@@ -20,6 +20,12 @@ def check_tool(name: str) -> bool:
 
 def get_tool_path(name: str) -> str | None:
     """Get the full path to a tool, checking standard PATH and extra locations."""
+    # Optional explicit override, e.g. INTERCEPT_RTL_FM_PATH=/opt/homebrew/bin/rtl_fm
+    env_key = f"INTERCEPT_{name.upper().replace('-', '_')}_PATH"
+    env_path = os.environ.get(env_key)
+    if env_path and os.path.isfile(env_path) and os.access(env_path, os.X_OK):
+        return env_path
+
     # Prefer native Homebrew binaries on Apple Silicon to avoid mixing Rosetta
     # /usr/local tools with arm64 Python/runtime.
     if platform.system() == 'Darwin':