diff --git a/lib/yashchiki/specfile_storage_path.py b/lib/yashchiki/specfile_storage_path.py
index ef0999e493eff0011aa197f7f6db216fe493c835..1d5b13dc515ca8b4f6215fc246521a43a6cd0785 100644
--- a/lib/yashchiki/specfile_storage_path.py
+++ b/lib/yashchiki/specfile_storage_path.py
@@ -30,8 +30,8 @@ for rspec in data:
     
     for ss in maybe_to_be_fetched:
         # we could skip sources for already installed packages?
-        #if ss.installed:
-        #    continue
+        if ss.installed:
+            continue
         pkg = ss.package
         to_be_fetched.append(pkg)
         print(spack.mirror.mirror_archive_paths(pkg.fetcher, 'whatever').storage_path)