Tweak emerge args, also use the right profile search term

gentoostrap.sh

@@ -169,7 +169,7 @@ build-gentoo-chroot() {
 	profile=$(
 		eselect profile list \
 			| grep -ie 'stable' \
-			| grep -ie "$profile" \
+			| grep -ie "$_optprofile" \
 			| head -n 1 \
 			| grep -oP '\[\K[^\]]+'
 		) || error "Error finding profile: $profile" 51
@@ -178,7 +178,7 @@ build-gentoo-chroot() {
 	eselect profile set "$profile"
 
 	# BEHOLD!
-	emerge -DNuv @world
+	emerge -DNUua @world --jobs --quiet-build y --with-bdeps y
 	# Configure timezone
 	emerge --config sys-libs/timezone-data
 	# Locales