diff --git a/src/output.rs b/src/output.rs
index 71fd0616..8caae460 100644
--- a/src/output.rs
+++ b/src/output.rs
@@ -119,7 +119,8 @@ impl OutputDir {
     /// the lock to be released. The returned `OutputDir` holds a lock for its lifetime.
     pub fn new(in_dir: &Utf8Path) -> Result<OutputDir> {
         if !in_dir.exists() {
-            create_dir(in_dir).context("create output parent directory {in_dir:?}")?;
+            create_dir(in_dir)
+                .with_context(|| format!("create output parent directory {in_dir:?}"))?;
         }
         let output_dir = in_dir.join(OUTDIR_NAME);
         if output_dir.exists() {