diff --git a/pkgs/development/ocaml-modules/arp/default.nix b/pkgs/development/ocaml-modules/arp/default.nix
index e1daca1bc38d..997e46e274f6 100644
--- a/pkgs/development/ocaml-modules/arp/default.nix
+++ b/pkgs/development/ocaml-modules/arp/default.nix
@@ -25,6 +25,7 @@ buildDunePackage rec {
   propagatedBuildInputs = [
     cstruct
     duration
+    ethernet
     ipaddr
     logs
     lwt
@@ -37,7 +38,6 @@ buildDunePackage rec {
   doCheck = true;
   checkInputs = [
     alcotest
-    ethernet
     mirage-clock-unix
     mirage-profile
     mirage-random