diff --git a/src/libfetchers/input-accessor.hh b/src/libfetchers/input-accessor.hh
index d5ac238b1..f385e6231 100644
--- a/src/libfetchers/input-accessor.hh
+++ b/src/libfetchers/input-accessor.hh
@@ -130,7 +130,7 @@ struct SourcePath
     { return accessor->getPhysicalPath(path); }
 
     std::string to_string() const
-    { return path.abs(); }
+    { return accessor->showPath(path); }
 
     /**
      * Append a `CanonPath` to this path.