diff --git a/.gitignore b/.gitignore
index 9e6bf7c..6d448f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 workspace
+uefi.img
diff --git a/build.sh b/build.sh
index 708364b..5f36221 100755
--- a/build.sh
+++ b/build.sh
@@ -3,4 +3,6 @@
 set -e
 . build_common.sh
 # not actually GCC5; it's GCC7 on Ubuntu 18.04.
-GCC5_AARCH64_PREFIX=aarch64-linux-gnu- build -n 0 -a AARCH64 -t GCC5 -p Pixel3XL/Pixel3XL.dsc
+GCC5_AARCH64_PREFIX=aarch64-linux-gnu- build -s -n 0 -a AARCH64 -t GCC5 -p Pixel3XL/Pixel3XL.dsc
+gzip -c < workspace/Build/Pixel3XL/DEBUG_GCC5/FV/PIXEL3XL_UEFI.fd >uefi.img
+cat crosshatch.dtb >>uefi.img
diff --git a/crosshatch.dtb b/crosshatch.dtb
new file mode 100644
index 0000000..a9d1b26
Binary files /dev/null and b/crosshatch.dtb differ