1 files changed, 4 insertions, 0 deletions

diff --git a/stack.yaml b/stack.yaml
index b981e5c..f36abc3 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,6 +1,10 @@
 resolver: lts-11.7
 packages:
   - edit-lens
+  - location:
+      git: https://github.com/pngwjpgh/composition-tree
+      commit: c9c1c11f6820bbbe1ac96513a66609599483bdb6
+    extra-dep: true
 nix:
   packages: []
   pure: false