Buidling with PageGraph

I am trying to build brahttps://global.discourse-cdn.com/brave/original/3X/4/3/4341356469f7d30a757b4d523a8dbe320d283bba.pngve browser with Page Graph, I followed the exact same steps mentioned here.

When I run npm run build, it starts to regenerate some ninja files and after regenerating these files, the program execution stops. Nothing is build. Here is a screenshot of my terminal, can someone please guide me here.