scripts/clean: fix to cleanup more dangling result symlinks

scripts/clean

@@ -2,8 +2,12 @@
 # remove artifacts which i've accidentally left lying around
 # e.g. `result -> /nix/store/...` symlinks
 
-pushd ..
-for result in $(fd --follow result); do
+pushd ~/nixos
+
+# if this exists it'll interfere with the search
+rm -f result
+
+for result in $(fd --follow result) $(fd -uuu result); do
   if [[ "$(readlink "$result")" != /nix/store/* ]]; then
     # not a build artifact
     continue