diff --git a/backend/chunker/chunker.go b/backend/chunker/chunker.go
index 72338c723..1d50b5385 100644
--- a/backend/chunker/chunker.go
+++ b/backend/chunker/chunker.go
@@ -277,14 +277,10 @@ func NewFs(ctx context.Context, name, rpath string, m configmap.Mapper) (fs.Fs,
 		return nil, errors.New("can't point remote at itself - check the value of the remote setting")
 	}
 
-	parsed, err := fspath.Parse(remote)
+	baseName, basePath, err := fspath.SplitFs(remote)
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to parse remote %q to wrap", remote)
 	}
-	baseName, basePath := parsed.ConfigString, parsed.Path
-	if baseName != "" {
-		baseName += ":"
-	}
 	// Look for a file first
 	remotePath := fspath.JoinRootPath(basePath, rpath)
 	baseFs, err := cache.Get(ctx, baseName+remotePath)