diff --git a/ape/data/datasets/odinw_instance.py b/ape/data/datasets/odinw_instance.py
index 1e0ebea..9a15374 100644
--- a/ape/data/datasets/odinw_instance.py
+++ b/ape/data/datasets/odinw_instance.py
@@ -820,5 +820,5 @@ def register_all_odinw(root):
 
 if __name__.endswith(".odinw_instance"):
     # Assume pre-defined datasets live in `./datasets`.
-    _root = os.getenv("DATASET", "datasets")
+    _root = os.getenv("DETECTRON2_DATASETS", "datasets")
     register_all_odinw(_root)
diff --git a/ape/data/datasets/register_bdd100k_semseg.py b/ape/data/datasets/register_bdd100k_semseg.py
index 2eee0ed..25fc716 100644
--- a/ape/data/datasets/register_bdd100k_semseg.py
+++ b/ape/data/datasets/register_bdd100k_semseg.py
@@ -94,5 +94,5 @@ def register_all_bdd_semseg(root):
 
 if __name__.endswith(".register_bdd100k_semseg"):
     # Assume pre-defined datasets live in `./datasets`.
-    _root = os.getenv("DATASET", "datasets")
+    _root = os.getenv("DETECTRON2_DATASETS", "datasets")
     register_all_bdd_semseg(_root)
diff --git a/ape/data/datasets/seginw_instance.py b/ape/data/datasets/seginw_instance.py
index 9c67f30..f9c487f 100644
--- a/ape/data/datasets/seginw_instance.py
+++ b/ape/data/datasets/seginw_instance.py
@@ -138,5 +138,5 @@ def register_all_seginw(root):
 
 if __name__.endswith(".seginw_instance"):
     # Assume pre-defined datasets live in `./datasets`.
-    _root = os.getenv("DATASET", "datasets")
+    _root = os.getenv("DETECTRON2_DATASETS", "datasets")
     register_all_seginw(_root)