--- a/Cargo.lock
+++ b/Cargo.lock
@@ -103,6 +103,7 @@
 dependencies = [
  "bincode",
  "closure",
+ "indexmap",
  "jsonnet-parser",
  "jsonnet-stdlib",
  "serde",
--- a/crates/jsonnet-evaluator/Cargo.toml
+++ b/crates/jsonnet-evaluator/Cargo.toml
@@ -14,6 +14,7 @@
 jsonnet-parser = { path = "../jsonnet-parser" }
 closure = "0.3.0"
 jsonnet-stdlib = { path = "../jsonnet-stdlib" }
+indexmap = "1.4.0"
 
 [dependencies.serde]
 version = "1.0.111"