diff --git a/src/gti_discovery/provenance.py b/src/gti_discovery/provenance.py
index e1e7434..cc51507 100644
--- a/src/gti_discovery/provenance.py
+++ b/src/gti_discovery/provenance.py
@@ -53,12 +53,19 @@ def _metadata_value(metadata: Any, name: str) -> Any:
     return None
 
 
+_BUILD_OUTPUT_DIRS = {"dist", "build", ".pytmp", ".git", "node_modules", "__pycache__", ".venv", "venv"}
+
+
 def _project_shadowing() -> list[str]:
+    """Source-tree files that could shadow the approved fdb driver. Generated output (PyInstaller dist/build
+    bundles legitimately contain their own fdb package) is not part of the import path and is skipped."""
     findings: list[str] = []
     try:
-        for path in PROJECT_ROOT.rglob("*"):
-            if path.name in {"fdb.py", "fdb"} or path.suffix == ".pth":
-                findings.append(str(path.resolve(strict=False)))
+        for root, dirs, files in os.walk(PROJECT_ROOT):
+            dirs[:] = [d for d in dirs if d not in _BUILD_OUTPUT_DIRS]
+            for name in dirs + files:
+                if name in {"fdb.py", "fdb"} or name.endswith(".pth"):
+                    findings.append(str((Path(root) / name).resolve(strict=False)))
     except OSError:
         return ["<project-scan-unavailable>"]
     return sorted(set(findings))