--- Makefile.orig	2021-05-03 20:52:36 UTC
+++ Makefile
@@ -21,8 +21,8 @@ DESTDIR ?= /usr/local
 TEST_IMAGE_LIST ?=
 
 # Used to populate variables in version package.
-VERSION=$(shell git describe --match 'v[0-9]*' --dirty='.m' --always)
-REVISION=$(shell git rev-parse HEAD)$(shell if ! git diff --no-ext-diff --quiet --exit-code; then echo .m; fi)
+VERSION?=unknown
+REVISION?=unknown
 PACKAGE=github.com/containerd/containerd
 SHIM_CGO_ENABLED ?= 0
 
