diff --git a/default.nix b/default.nix
index 72d594e..9256e9b 100644
--- a/default.nix
+++ b/default.nix
@@ -12,5 +12,11 @@ stdenv.mkDerivation rec {
   ];
 
   src = ./.;
+
+  installPhase = ''
+    mkdir -p $out/nix-support
+    cp out/main.pdf $out/
+    echo "file pdf $out/main.pdf" >> $out/nix-support/hydra-build-products
+  '';
 }