diff --git a/config/custom-environment-variables.yaml b/config/custom-environment-variables.yaml
index 66e0e96..bb9e340 100644
--- a/config/custom-environment-variables.yaml
+++ b/config/custom-environment-variables.yaml
@@ -96,7 +96,7 @@ executor:
                     # upper bound for user custom memory
                     max: K8S_MEMORY_MAX
                 disk:
-                  high: K8S_DISK_LABEL
+                  space: K8S_DISK_LABEL
                   speed: K8S_DISK_SPEED_LABEL
             # Default build timeout for all builds in this cluster
             buildTimeout: K8S_VM_BUILD_TIMEOUT