diff --git a/stack.yaml b/stack.yaml
index 45d2a46..975800d 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -37,7 +37,6 @@ resolver: lts-7.6
 # will not be run. This is useful for tweaking upstream packages.
 packages:
 - '.'
-- '../mathexpr'
 # Dependency packages to be pulled from upstream that are not in the resolver
 # (e.g., acme-missiles-0.3)
 extra-deps: