--- a/crates/jsonnet-evaluator/src/error.rs
+++ b/crates/jsonnet-evaluator/src/error.rs
@@ -2,7 +2,7 @@
 use jsonnet_parser::LocExpr;
 use std::path::PathBuf;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum Error {
 	VariableIsNotDefined(String),
 	TypeMismatch(&'static str, Vec<ValType>, ValType),
@@ -39,9 +39,9 @@
 
 #[derive(Clone, Debug)]
 pub struct StackTraceElement(pub LocExpr, pub String);
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct StackTrace(pub Vec<StackTraceElement>);
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct LocError(pub Error, pub StackTrace);
 pub type Result<V> = std::result::Result<V, LocError>;
--- a/crates/jsonnet-evaluator/src/val.rs
+++ b/crates/jsonnet-evaluator/src/val.rs
@@ -96,7 +96,7 @@
 	}
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum ValType {
 	Bool,
 	Null,