diff --git a/quapy/classification/__init__.py b/quapy/classification/__init__.py
index 33551b7..b63e0eb 100644
--- a/quapy/classification/__init__.py
+++ b/quapy/classification/__init__.py
@@ -1,4 +1,3 @@
 from . import calibration
-from . import labelshift
 from . import methods
 from . import svmperf
diff --git a/quapy/method/aggregative.py b/quapy/method/aggregative.py
index 23341b6..1decb39 100644
--- a/quapy/method/aggregative.py
+++ b/quapy/method/aggregative.py
@@ -2218,9 +2218,11 @@ KDEyML = _kdey.KDEyML
 KDEyHD = _kdey.KDEyHD
 KDEyCS = _kdey.KDEyCS
 
-from . import _liep
-
-LEIP = _liep.LEIP
+try:
+    from . import _liep_draft as _liep
+    LEIP = _liep.LEIP
+except AttributeError:
+    LEIP = "LEIP is not available (incomplete implementation in _liep_draft.py)"
 
 
 # ---------------------------------------------------------------