slidenado: add missing subdir

slidenado.nix

@@ -17,10 +17,10 @@ let
       name = "slidenado-${name}";
       src = <slidenado>;
       buildInputs = [ texlive.combined.scheme-basic ];
-      makeFlags = [ "${name}.pdf" ];
+      makeFlags = [ "presentations/${name}.pdf" ];
       postInstall = ''
         mkdir -p $out/nix-support
-        cp ${name}.pdf $out/
+        cp presentations/${name}.pdf $out/
         echo doc-pdf slides $out/${name}.pdf >> $out/nix-support/hydra-build-products
       '';
     };