Did Jacob's impersonation of Esau constitute the sin of lying?

Rebecca, after overhearing Isaac telling Esau to go and catch a game, prepared a meal for Jacob so he could bless him. However, she advised Jacob to impersonate his brother to receive Esau's blessings instead. How does that not constitute the sin of lying through impersonation, which is deemed immoral and can lead to condemnation if a Christian unapologetically commits? (See story in Genesis 27.)