diff --git a/crates/util/src/rel_path.rs b/crates/util/src/rel_path.rs
index 8b6ae6e49a67ae1ef2d21b3b1e0c4708f407a5e3..5e20aacad5fe177cd1af65dc98aeb45565a3082e 100644
--- a/crates/util/src/rel_path.rs
+++ b/crates/util/src/rel_path.rs
@@ -161,7 +161,7 @@ impl RelPath {
         false
     }
 
-    pub fn strip_prefix<'a>(&'a self, other: &Self) -> Result<&'a Self> {
+    pub fn strip_prefix<'a>(&'a self, other: &Self) -> Result<&'a Self, StripPrefixError> {
         if other.is_empty() {
             return Ok(self);
         }
@@ -172,7 +172,7 @@ impl RelPath {
                 return Ok(Self::empty());
             }
         }
-        Err(anyhow!("failed to strip prefix: {other:?} from {self:?}"))
+        Err(StripPrefixError)
     }
 
     pub fn len(&self) -> usize {
@@ -251,6 +251,9 @@ impl RelPath {
     }
 }
 
+#[derive(Debug)]
+pub struct StripPrefixError;
+
 impl ToOwned for RelPath {
     type Owned = RelPathBuf;