diff --git a/src/platform/kevin/ecfw/default.nix b/src/platform/kevin/ecfw/default.nix
index 493277e..1ed495b 100644
--- a/src/platform/kevin/ecfw/default.nix
+++ b/src/platform/kevin/ecfw/default.nix
@@ -19,7 +19,7 @@ let makeTarget = "build/${boardName}/ec.bin";
 
 in stdenv.mkDerivation (finalAttrs: {
   pname = "chromebook-ec-firmware";
-  version = "${boardName}-1d2c13";
+  version = "${boardName}-${finalAttrs.src.rev}";
 
   src = fetchgit {
     url = "https://chromium.googlesource.com/chromiumos/platform/ec";