Sorry, you can't build Construct without building ProfUIS284yn.lib from a purchased edition of Prof-UIS. The library covers the entire UI so it's not like you could remove it and build anyway. We're not allowed to distribute it ourselves since it would amount to publishing the purchased Prof-UIS. If you've got as far as the linker, though, you've at least successfully compiled all the source files. We'll definitely remove the Prof-UIS library in Construct 2 though. We've been rightly criticised as not being a true open source project since you must purchase a library to compile the IDE source code. As I said, it was a bad decision.
You can build the runtime without the Prof-UIS libraries, though.