diff --git a/lib/path.nix b/lib/path.nix
index dcd5646..fb37f11 100644
--- a/lib/path.nix
+++ b/lib/path.nix
@@ -14,6 +14,7 @@ let
   #   absolutePathComponentsBetween /a     /a/b/c == ["b" "c"]
   #   absolutePathComponentsBetween /a/b/c /a/b/c == []
   absolutePathComponentsBetween =
+    # TODO: port the tests from https://github.com/NixOS/nixpkgs/pull/112083
     ancestor: descendant:
       let
         a' = /. + ancestor;
@@ -43,6 +44,8 @@ let
     # Filesystem location below which the returned function is defined. `/.` may be acceptable, but a path closer to the data of interest is better.
     root:
 
+    # TODO: port the tests from https://github.com/NixOS/nixpkgs/pull/112083
+
     let
       makeTree = dir: type: {
         value = f dir type;