fix headers?

ExampleApps.nix

@@ -6,6 +6,8 @@
 
         src = ./.;
 
+        outputs = [ "out" "dev" ];
+
         nativeBuildInputs = with pkgs; [
             clang
         ];
@@ -24,6 +26,10 @@
         installPhase = ''
             mkdir -p $out/bin
             cp $name $out/bin
+
+            mkdir -p $dev/include/modules
+            cp -r include/* $dev/include
+            cp -r modules $dev/include/modules
         '';
 
     };