1 files changed, 12 insertions, 2 deletions
diff --git a/tvix/nix-compat/src/derivation/write.rs b/tvix/nix-compat/src/derivation/write.rs
index 83106cd9e6..04810e736a 100644
--- a/tvix/nix-compat/src/derivation/write.rs
+++ b/tvix/nix-compat/src/derivation/write.rs
@@ -33,6 +33,13 @@ pub const QUOTE: char = '"';
 /// the context a lot.
 pub(crate) trait AtermWriteable: Display {
     fn aterm_write(&self, writer: &mut impl Write) -> std::io::Result<()>;
+
+    fn aterm_bytes(&self) -> Vec<u8> {
+        let mut bytes = Vec::new();
+        self.aterm_write(&mut bytes)
+            .expect("unexpected write errors to Vec");
+        bytes
+    }
 }
 
 impl AtermWriteable for StorePathRef<'_> {
@@ -182,12 +189,15 @@ pub(crate) fn write_input_derivations(
 
 pub(crate) fn write_input_sources(
     writer: &mut impl Write,
-    input_sources: &BTreeSet<String>,
+    input_sources: &BTreeSet<StorePath>,
 ) -> Result<(), io::Error> {
     write_char(writer, BRACKET_OPEN)?;
     write_array_elements(
         writer,
-        &input_sources.iter().map(String::from).collect::<Vec<_>>(),
+        &input_sources
+            .iter()
+            .map(StorePath::to_absolute_path)
+            .collect::<Vec<_>>(),
     )?;
     write_char(writer, BRACKET_CLOSE)?;