diff --git a/pkgs/os-specific/linux/ena/default.nix b/pkgs/os-specific/linux/ena/default.nix
index 1257217a520..5873a2fe2c1 100644
--- a/pkgs/os-specific/linux/ena/default.nix
+++ b/pkgs/os-specific/linux/ena/default.nix
@@ -14,6 +14,7 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "pic" ];
 
   nativeBuildInputs = kernel.moduleBuildDependencies;
+  makeFlags = kernel.makeFlags;
 
   # linux 3.12
   NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
@@ -27,7 +28,7 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     runHook preInstall
-    strip -S ena.ko
+    $STRIP -S ena.ko
     dest=$out/lib/modules/${kernel.modDirVersion}/misc
     mkdir -p $dest
     cp ena.ko $dest/