diff --git a/tvix/glue/src/builtins/import.rs b/tvix/glue/src/builtins/import.rs
index 9257975a0..a3273eca1 100644
--- a/tvix/glue/src/builtins/import.rs
+++ b/tvix/glue/src/builtins/import.rs
@@ -284,27 +284,29 @@ mod import_builtins {
             }
         };
 
-        let obtained_hash = ca_hash.hash().clone().into_owned();
         let (path_info, _hash, output_path) = state.tokio_handle.block_on(async {
             state
-                .node_to_path_info(name.as_ref(), path.as_ref(), ca_hash, root_node)
+                .node_to_path_info(name.as_ref(), path.as_ref(), &ca_hash, root_node)
                 .await
         })?;
 
         if let Some(expected_sha256) = expected_sha256 {
-            if obtained_hash != expected_sha256 {
+            if *ca_hash.hash() != expected_sha256 {
                 Err(ImportError::HashMismatch(
                     path.to_string_lossy().to_string(),
                     expected_sha256,
-                    obtained_hash,
+                    ca_hash.hash().into_owned(),
                 ))?;
             }
         }
 
-        let _: tvix_store::proto::PathInfo = state.tokio_handle.block_on(async {
-            // This is necessary to cause the coercion of the error type.
-            Ok::<_, std::io::Error>(state.path_info_service.as_ref().put(path_info).await?)
-        })?;
+        state
+            .tokio_handle
+            .block_on(async { state.path_info_service.as_ref().put(path_info).await })
+            .map_err(|e| tvix_eval::ErrorKind::IO {
+                path: Some(path.to_path_buf()),
+                error: Rc::new(e.into()),
+            })?;
 
         // We need to attach context to the final output path.
         let outpath = output_path.to_absolute_path();
@@ -339,7 +341,7 @@ mod import_builtins {
                     .register_node_in_path_info_service(
                         name,
                         &p,
-                        CAHash::Nar(NixHash::Sha256(nar_sha256)),
+                        &CAHash::Nar(NixHash::Sha256(nar_sha256)),
                         root_node,
                     )
                     .await
diff --git a/tvix/glue/src/tvix_store_io.rs b/tvix/glue/src/tvix_store_io.rs
index b0367f60a..4e5488067 100644
--- a/tvix/glue/src/tvix_store_io.rs
+++ b/tvix/glue/src/tvix_store_io.rs
@@ -357,7 +357,7 @@ impl TvixStoreIO {
         &self,
         name: &str,
         path: &Path,
-        ca: CAHash,
+        ca: &CAHash,
         root_node: Node,
     ) -> io::Result<(PathInfo, NixHash, StorePath)> {
         // Ask the PathInfoService for the NAR size and sha256
@@ -372,7 +372,7 @@ impl TvixStoreIO {
 
         // Calculate the output path. This might still fail, as some names are illegal.
         let output_path =
-            nix_compat::store_path::build_ca_path(name, &ca, Vec::<String>::new(), false).map_err(
+            nix_compat::store_path::build_ca_path(name, ca, Vec::<String>::new(), false).map_err(
                 |_| {
                     std::io::Error::new(
                         std::io::ErrorKind::InvalidData,
@@ -399,7 +399,7 @@ impl TvixStoreIO {
         &self,
         name: &str,
         path: &Path,
-        ca: CAHash,
+        ca: &CAHash,
         root_node: Node,
     ) -> io::Result<StorePath> {
         let (path_info, _, output_path) = self.node_to_path_info(name, path, ca, root_node).await?;
diff --git a/tvix/store/src/import.rs b/tvix/store/src/import.rs
index 9d7a99558..70a97982e 100644
--- a/tvix/store/src/import.rs
+++ b/tvix/store/src/import.rs
@@ -81,7 +81,7 @@ pub fn path_to_name(path: &Path) -> std::io::Result<&str> {
 pub fn derive_nar_ca_path_info(
     nar_size: u64,
     nar_sha256: [u8; 32],
-    ca: Option<CAHash>,
+    ca: Option<&CAHash>,
     root_node: Node,
 ) -> PathInfo {
     // assemble the [crate::proto::PathInfo] object.
@@ -145,7 +145,7 @@ where
     let path_info = derive_nar_ca_path_info(
         nar_size,
         nar_sha256,
-        Some(CAHash::Nar(NixHash::Sha256(nar_sha256))),
+        Some(&CAHash::Nar(NixHash::Sha256(nar_sha256))),
         root_node,
     );