--- a/crates/jrsonnet-interner/src/lib.rs
+++ b/crates/jrsonnet-interner/src/lib.rs
@@ -6,7 +6,7 @@
 #![warn(clippy::pedantic, clippy::nursery)]
 #![allow(clippy::missing_const_for_fn)]
 use std::{
-	borrow::Cow,
+	borrow::{Borrow, Cow},
 	cell::RefCell,
 	fmt::{self, Display},
 	hash::{BuildHasherDefault, Hash, Hasher},
@@ -57,6 +57,17 @@
 	}
 }
 
+impl Borrow<str> for IStr {
+	fn borrow(&self) -> &str {
+		self.as_str()
+	}
+}
+impl Borrow<[u8]> for IStr {
+	fn borrow(&self) -> &[u8] {
+		self.as_bytes()
+	}
+}
+
 impl PartialEq for IStr {
 	fn eq(&self, other: &Self) -> bool {
 		// all IStr should be inlined into same pool
@@ -135,6 +146,12 @@
 	}
 }
 
+impl Borrow<[u8]> for IBytes {
+	fn borrow(&self) -> &[u8] {
+		self.0.as_slice()
+	}
+}
+
 impl PartialEq for IBytes {
 	fn eq(&self, other: &Self) -> bool {
 		// all IStr should be inlined into same pool
--- a/crates/jrsonnet-stdlib/src/misc.rs
+++ b/crates/jrsonnet-stdlib/src/misc.rs
@@ -3,6 +3,7 @@
 use jrsonnet_evaluator::{
 	error::{ErrorKind::*, Result},
 	function::{builtin, ArgLike, CallLocation, FuncVal},
+	manifest::JsonFormat,
 	throw,
 	typed::{Either2, Either4},
 	val::{equals, ArrValue},