diff --git a/src/ambient-context/dune b/src/ambient-context/dune
index f2198d5..68e7acf 100644
--- a/src/ambient-context/dune
+++ b/src/ambient-context/dune
@@ -12,5 +12,4 @@
   (select
    hmap_key_.ml
    from
-   (rcontext hmap -> hmap_key_.rcontext.ml)
    (-> hmap_key_.new.ml))))
diff --git a/src/ambient-context/hmap_key_.rcontext.ml b/src/ambient-context/hmap_key_.rcontext.ml
deleted file mode 100644
index 99f136e..0000000
--- a/src/ambient-context/hmap_key_.rcontext.ml
+++ /dev/null
@@ -1 +0,0 @@
-let key : Hmap.t Thread_local_storage.t = Rcontext.Ambient_hmap.k_hmap