diff --git a/pkgs/development/ocaml-modules/hacl-star/raw.nix b/pkgs/development/ocaml-modules/hacl-star/raw.nix
index ce076ca779adb..027d6fe178540 100644
--- a/pkgs/development/ocaml-modules/hacl-star/raw.nix
+++ b/pkgs/development/ocaml-modules/hacl-star/raw.nix
@@ -38,12 +38,14 @@ stdenv.mkDerivation rec {
     runHook postBuild
   '';
 
+  preInstall = ''
+    mkdir $out
+    mkdir -p $OCAMLFIND_DESTDIR/stublibs
+  '';
+
   installPhase = ''
     runHook preInstall
 
-    echo $OCAMLFIND_DESTDIR
-    mkdir $out
-    mkdir -p $OCAMLFIND_DESTDIR/stublibs
     make -C hacl-star-raw install
 
     runHook postInstall