diff --git a/Pantograph/Environment.lean b/Pantograph/Environment.lean
index 19c3249..303c2b5 100644
--- a/Pantograph/Environment.lean
+++ b/Pantograph/Environment.lean
@@ -64,7 +64,7 @@ def inspect (args: Protocol.EnvInspect) (options: @&Protocol.Options): CoreM (Pr
       else .none,
     valueDependency? := ← if args.dependency?.getD false
       then info.value?.mapM (λ e => do
-        let e ← (unfoldAuxLemmas e).run'
+        let e ← unfoldAuxLemmas e
         pure $ e.getUsedConstants.filter (!isNameInternal ·) |>.map (λ n => name_to_ast n) )
       else pure (.none),
     module? := module?
diff --git a/Pantograph/Serial.lean b/Pantograph/Serial.lean
index bf79314..7377c68 100644
--- a/Pantograph/Serial.lean
+++ b/Pantograph/Serial.lean
@@ -15,7 +15,7 @@ def Lean.Name.isAuxLemma (n : Lean.Name) : Bool := n matches .num (.str _ "_auxL
 namespace Pantograph
 
 /-- Unfold all lemmas created by `Lean.Meta.mkAuxLemma`. These end in `_auxLemma.nn` where `nn` is a number. -/
-def unfoldAuxLemmas (e : Lean.Expr) : Lean.MetaM Lean.Expr := do
+def unfoldAuxLemmas (e : Lean.Expr) : Lean.CoreM Lean.Expr := do
   Lean.Meta.deltaExpand e Lean.Name.isAuxLemma
 
 --- Input Functions ---