diff --git a/env.yml b/env.yml
index 4b6050b84..9eaaffbe7 100644
--- a/env.yml
+++ b/env.yml
@@ -32,7 +32,7 @@ dependencies:
   - pytorch >=1.10.2,<2.0
   - tensorboard
   - lightning >=2.0
-  - lightning-graphcore
+  - pip::lightning-graphcore  # optional, for using IPUs only
   - torchvision
   - torchmetrics >=0.7.0,<0.11
   - ogb