diff --git a/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix b/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
index 16d858b00bed..cf4584979ba2 100644
--- a/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
+++ b/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
@@ -11,7 +11,9 @@ stdenv.mkDerivation {
     sha256 = "1r76zvln3bwycxlmqday0sqzv5j260y7mdh66as2aqny6jzd5ld7";
   };
 
-  buildInputs = [ mpi gfortran ];
+  nativeBuildInputs = [ gfortran ];
+
+  buildInputs = [ mpi ];
 
   configurePhase = ''
     cd source