diff --git a/core/build_id.mk b/core/build_id.mk
index 261f23a..ffff91e 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -13,9 +13,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+#
+# Defines branch-specific values.
+#
+
 # BUILD_ID is usually used to specify the branch name
 # (like "MAIN") or a branch name and a release candidate
-# (like "CRB01").  It must be a single word, and is
+# (like "TC1-RC5").  It must be a single word, and is
 # capitalized by convention.
+#
+BUILD_ID := JB_MR2
 
-export BUILD_ID=JWR50B
+# DISPLAY_BUILD_NUMBER should only be set for development branches,
+# If set, the BUILD_NUMBER (cl) is appended to the BUILD_ID for
+# a more descriptive BUILD_ID_DISPLAY, otherwise BUILD_ID_DISPLAY
+# is the same as BUILD_ID
+DISPLAY_BUILD_NUMBER := true
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index a3047e3..0830101 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -72,8 +72,5 @@
     mac_permissions.xml
 
 PRODUCT_COPY_FILES += \
-    external/sepolicy/sepolicy.version:root/sepolicy.version
-
-PRODUCT_COPY_FILES += \
     system/core/rootdir/init.usb.rc:root/init.usb.rc \
     system/core/rootdir/init.trace.rc:root/init.trace.rc \