diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-0.2.2-r1.ebuild b/sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-0.4.0.ebuild
similarity index 100%
rename from sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-0.2.2-r1.ebuild
rename to sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-0.4.0.ebuild
diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-9999.ebuild b/sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-9999.ebuild
index fa4762df3e..ea863d371e 100644
--- a/sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-9999.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/app-emulation/acbuild/acbuild-9999.ebuild
@@ -11,7 +11,7 @@ inherit coreos-go toolchain-funcs cros-workon
 if [[ "${PV}" == 9999 ]]; then
     KEYWORDS="~amd64 ~arm64"
 else
-    CROS_WORKON_COMMIT="e49e7de27443374a5356b7ccd9d9d7691fb5089f" # v0.2.2
+    CROS_WORKON_COMMIT="2d120a832bd4c3601ca307bf7dd1612a12b55d29" # v0.4.0
     KEYWORDS="amd64 arm64"
 fi