--- a/src/orpie/dune	2021-10-05 06:09:09.040120000 +0200
+++ b/src/orpie/dune	2021-10-05 06:10:06.568418512 +0200
@@ -18,7 +18,7 @@
 ; Support $PREFIX for overriding installation location
 (rule
   (targets install.ml)
-  (action (run %{project_root}/scripts/compute_prefix subst %{deps} %{targets}))
+  (action (copy# %{deps} %{targets}))
   (deps (file install.ml.in)))