Take the query into account for plain path flakerefs

The query parameters for path flakerefs (`/foo/bar?query=blah` or
`.?foo=bar`) was ignored when the path wasn't a git repo.
Fix that

src/libexpr/flake/flakeref.cc

@@ -171,11 +171,16 @@ std::pair<FlakeRef, std::string> parsePathFlakeRefWithFragment(
         path = canonPath(path + "/" + getOr(query, "dir", ""));
     }
 
-    fetchers::Attrs attrs;
-    attrs.insert_or_assign("type", "path");
-    attrs.insert_or_assign("path", path);
-
-    return std::make_pair(FlakeRef(fetchers::Input::fromAttrs(std::move(attrs)), ""), fragment);
+    auto parsedURL = ParsedURL{
+        .url = url,
+        .base = url,
+        .scheme = "path",
+        .authority = "",
+        .path = path,
+        .query = query,
+    };
+
+    return std::make_pair(FlakeRef(fetchers::Input::fromURL(parsedURL), getOr(parsedURL.query, "dir", "")), fragment);
 };