epgstation: move node-pre-gyp and node-gyp-build to buildInputs

pkgs/applications/video/epgstation/default.nix

@@ -42,7 +42,7 @@ let
     production = false;
 
     buildInputs = [ bash ];
-    nativeBuildInputs = drv.nativeBuildInputs ++ [
+    nativeBuildInputs = (drv.nativeBuildInputs or [ ]) ++ [
       makeWrapper
     ];
 

pkgs/development/node-packages/default.nix

@@ -119,7 +119,7 @@ let
     # NOTE: this is a stub package to fetch npm dependencies for
     # ../../applications/video/epgstation
     epgstation = super."epgstation-../../applications/video/epgstation".override (drv: {
-      nativeBuildInputs = [ self.node-pre-gyp self.node-gyp-build ];
+      buildInputs = [ self.node-pre-gyp self.node-gyp-build ];
       meta = drv.meta // {
         platforms = pkgs.lib.platforms.none;
       };