diff --git a/nix/ovni.nix b/nix/ovni.nix
index 5f024af..fd010bb 100644
--- a/nix/ovni.nix
+++ b/nix/ovni.nix
@@ -2,12 +2,13 @@
   stdenv
 , cmake
 , mpi
+, include-what-you-use
 }:
 
 stdenv.mkDerivation rec {
   name = "ovni";
 
-  buildInputs = [ cmake mpi ];
+  buildInputs = [ cmake mpi include-what-you-use ];
 
   # Prevent accidental reutilization of previous builds, as we are taking the
   # current directory as-is