Hacky fix to include the correct espresso kernel.  This needs to be fixed in kernel.mk.
diff --git a/products/cyanogen_espresso.mk b/products/cyanogen_espresso.mk
index c41c461..b6d9634 100644
--- a/products/cyanogen_espresso.mk
+++ b/products/cyanogen_espresso.mk
@@ -34,3 +34,5 @@
 #
 PRODUCT_COPY_FILES +=  \
     vendor/cyanogen/prebuilt/espresso/media/bootanimation.zip:system/media/bootanimation.zip
+
+TARGET_PREBUILT_KERNEL := device/htc/espresso/kernel