diff --git a/qualibrate_config/core/migration/migrations/v3_v4.py b/qualibrate_config/core/migration/migrations/v3_v4.py
index 2460e7f..e982d8e 100644
--- a/qualibrate_config/core/migration/migrations/v3_v4.py
+++ b/qualibrate_config/core/migration/migrations/v3_v4.py
@@ -1,5 +1,5 @@
+import sys
 from copy import deepcopy
-from importlib.util import find_spec
 from pathlib import Path
 
 from qualibrate_config.core.migration.migrations.base import MigrateBase
@@ -22,13 +22,18 @@ def backward(data: RawConfigType, config_path: Path) -> RawConfigType:
         static_files = app.get("static_site_files")
         if static_files is not None:
             return {"qualibrate": qualibrate, **data}
-        app_module = find_spec("qualibrate_app")
-        if app_module is None or app_module.origin is None:
-            return {"qualibrate": qualibrate, **data}
-        module_path = Path(app_module.origin)
-        app["static_site_files"] = str(
-            module_path.parents[1] / "qualibrate_static"
-        )
+        # Walk sys.path to find qualibrate_app's install location. Nuitka-safe
+        # alternative to find_spec("qualibrate_app").origin (which returns a
+        # phantom path under obfuscated builds). Semantics preserved: find the
+        # qualibrate_app package dir, go up one level (to site-packages), and
+        # append "qualibrate_static".
+        for entry in sys.path:
+            qa_dir = Path(entry) / "qualibrate_app"
+            if qa_dir.is_dir():
+                app["static_site_files"] = str(
+                    qa_dir.parent / "qualibrate_static"
+                )
+                break
         return {"qualibrate": qualibrate, **data}
 
     @staticmethod
diff --git a/qualibrate_config/models/q_app.py b/qualibrate_config/models/q_app.py
index 9f00370..136bd43 100644
--- a/qualibrate_config/models/q_app.py
+++ b/qualibrate_config/models/q_app.py
@@ -1,4 +1,4 @@
-from importlib.util import find_spec
+import sys
 from pathlib import Path
 from typing import Annotated
 
@@ -12,10 +12,20 @@
 
 
 def get_default_static_path() -> Path | None:
-    app_module = find_spec("qualibrate.app")
-    if app_module is None or app_module.origin is None:
-        return None
-    return Path(app_module.origin).resolve().parent / "qualibrate_static"
+    """Locate the qualibrate frontend static files.
+
+    Walks sys.path (CPython's list of directories where packages live) rather
+    than relying on __file__ / find_spec().origin / importlib.resources, all
+    of which Nuitka's custom loader corrupts with phantom paths in obfuscated
+    builds. sys.path is maintained by CPython itself and Nuitka does not
+    intercept it, so this lookup works identically for source and compiled
+    installs.
+    """
+    for entry in sys.path:
+        candidate = Path(entry) / "qualibrate" / "app" / "qualibrate_static"
+        if candidate.is_dir():
+            return candidate
+    return None
 
 
 class QualibrateAppConfig(BaseConfig):
diff --git a/tests/unit/test_cli/test_migrations/test_v3_v4.py b/tests/unit/test_cli/test_migrations/test_v3_v4.py
index b03737c..fbb05f6 100644
--- a/tests/unit/test_cli/test_migrations/test_v3_v4.py
+++ b/tests/unit/test_cli/test_migrations/test_v3_v4.py
@@ -1,6 +1,5 @@
+import sys
 from copy import deepcopy
-from importlib.util import find_spec
-from pathlib import Path
 
 from qualibrate_config.core.migration.migrations import v3_v4
 
@@ -79,14 +78,14 @@ def test_migrate_v4_v3_without_static_app_exists(mocker, tmp_path):
     config_v4 = deepcopy(CONFIG_V3)
     config_v4["qualibrate"]["version"] = 4
     config_v4["qualibrate"]["app"].pop("static_site_files")
-    config_spec = find_spec("qualibrate_config")
-    mocker.patch(
-        "qualibrate_config.core.migration.migrations.v3_v4.find_spec",
-        return_value=config_spec,
-    )
+    # Simulate `qualibrate_app` being installed at tmp_path by creating the
+    # package dir and pointing sys.path at tmp_path. The migration's sys.path
+    # walk will then find it and derive the static_site_files from its parent.
+    (tmp_path / "qualibrate_app").mkdir()
+    mocker.patch.object(sys, "path", [str(tmp_path)])
     config_v3_migrated = v3_v4.Migrate.backward(config_v4, tmp_path)
     config_v3_expected = deepcopy(CONFIG_V3)
     config_v3_expected["qualibrate"]["app"]["static_site_files"] = str(
-        Path(config_spec.origin).parents[1] / "qualibrate_static"
+        tmp_path / "qualibrate_static"
     )
     assert config_v3_expected == config_v3_migrated