diff --git a/pkgs/by-name/mp/mpiCheckPhaseHook/mpi-check-hook.sh b/pkgs/by-name/mp/mpiCheckPhaseHook/mpi-check-hook.sh
index be2203951c0f..139dc932366f 100644
--- a/pkgs/by-name/mp/mpiCheckPhaseHook/mpi-check-hook.sh
+++ b/pkgs/by-name/mp/mpiCheckPhaseHook/mpi-check-hook.sh
@@ -72,8 +72,5 @@ setupMpiCheck() {
       export HWLOC_XMLFILE="@topology@"
       ;;
   esac
-
-  # Limit number of OpenMP threads. Default is "all cores".
-  export OMP_NUM_THREADS=1
 }
 
diff --git a/pkgs/by-name/mp/mpiCheckPhaseHook/package.nix b/pkgs/by-name/mp/mpiCheckPhaseHook/package.nix
index e5bdc817379d..db5832c28a6e 100644
--- a/pkgs/by-name/mp/mpiCheckPhaseHook/package.nix
+++ b/pkgs/by-name/mp/mpiCheckPhaseHook/package.nix
@@ -1,8 +1,8 @@
 {
   lib,
-  callPackage,
   makeSetupHook,
   stdenv,
+  openmpCheckPhaseHook,
 }:
 
 makeSetupHook {
@@ -13,5 +13,9 @@ makeSetupHook {
     topology = ./topology.xml;
   };
 
+  propagatedNativeBuildInputs = [
+    openmpCheckPhaseHook
+  ];
+
   meta.license = lib.licenses.mit;
 } ./mpi-check-hook.sh