diff --git a/alarm/ec-utils/PKGBUILD b/alarm/ec-utils/PKGBUILD
index 0405bddfc..87feade44 100644
--- a/alarm/ec-utils/PKGBUILD
+++ b/alarm/ec-utils/PKGBUILD
@@ -3,25 +3,23 @@
 buildarch=4
 
 pkgname=ec-utils
-pkgver=1.9.0
+pkgver=6557.166d7a72df
 pkgrel=1
 pkgdesc="Chromium OS Embedded Controller utilities"
 arch=('armv7h')
 makedepends=('git' 'inetutils')
 license=('custom:chromiumos')
-source=("git+https://chromium.googlesource.com/chromiumos/platform/ec#tag=v${pkgver}")
+source=("git+https://chromium.googlesource.com/chromiumos/platform/ec")
 md5sums=('SKIP')
 
-prepare() {
+pkgver() {
   cd ec
-  sed -i 's/ccache //g' Makefile.toolchain
-  cd util
-  sed -i 's/_BSD_SOURCE/_DEFAULT_SOURCE/g' stm32mon.c ec_uartd.c
+  echo $(git rev-list --count HEAD).$(git rev-parse --short HEAD)
 }
 
 build() {
   cd ec
-  HOST_CROSS_COMPILE= make utils-host
+  CCACHE= HOST_CROSS_COMPILE= make utils-host
 }
 
 package() {