In the NPP, if Paul's "works of the law" are only circumcision and diet, how is Galatians 3:10 interpreted?

One of the implications of the [New Perspective on Paul](https://en.wikipedia.org/wiki/New_Perspective_on_Paul) (NPP), as I understand it, is that Paul's teachings regarding the "works of the law" (in [Galatians 2:16](https://www.biblegateway.com/passage/?search=galatians+2%3A16&version=ESV) , for example) are meant to refer only to "boundary marker" laws, that is, laws like circumcision, diet, and calendar, as opposed to all of God's law. This can have a significant impact on one's doctrine of justification, as it opens the door for other "works" (besides circumcision, etc.) to be part of the basis of one's salvation. One challenge to this aspect of the NPP that I've seen is based on other references to the "works of the law" in Paul's writings, where he uses the same phrase but appears to be referring to the entire law. For example, [Romans 3:20](https://www.biblegateway.com/passage/?search=romans+3%3A20&version=ESV) : > For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin. (ESV) Here, critics of the NPP say, Paul is clearly referring to the entire law, not just "boundary marker" laws, since elsewhere he recognizes many other sins besides failure to circumcise. But to me an even stronger passage appears to be [Galatians 3:10](https://www.biblegateway.com/passage/?search=galatians+3%3A10&version=ESV) : > For all who rely on works of the law are under a curse; for it is written, “Cursed be everyone who does not abide by all things written in the Book of the Law, and do them.” (ESV) Here, quoting [Leviticus 18:5](https://www.biblegateway.com/passage/?search=leviticus+18%3A5&version=ESV) , Paul's use of "*all* things written in the Book of the Law," as opposed to *some*, is seen as plain evidence that "works of the law" to him means more than just circumcision, etc. Thus, the question: **How do proponents of the New Perspective on Paul respond to challenges to their view of Paul's "works of the law" that are based on Galatians 3:10 and similar passages?**