Update CLI build

Account for changes in docker/cli#2993

Author: tianon

docker-master/Dockerfile.build

@@ -23,7 +23,7 @@ ENV DOCKER_BUILDTAGS \
 # we cannot support devicemapper properly in a fully-static binary
 		exclude_graphdriver_devicemapper
 
-ENV DOCKER_GITCOMMIT af79e6a074e124c160fa87911fd432fd12b11668
+ENV DOCKER_GITCOMMIT 06ad89b957c2102620e95081f92c31f55c809fab
 
 WORKDIR /docker-ce
 RUN set -ex; \
@@ -40,8 +40,10 @@ RUN set -eux; \
 
 RUN set -eux; \
 	echo 'module github.com/docker/cli' > components/cli/go.mod; \
-	GOFLAGS='-mod=vendor' make -C components/cli binary; \
-	cp -avlL components/cli/build/docker /usr/local/bin/; \
+	cd components/cli; \
+# can't use the Makefile anymore thanks to https://github.com/docker/cli/pull/2993 ...
+	GOFLAGS='-mod=vendor' CGO_ENABLED=0 GITCOMMIT="$DOCKER_GITCOMMIT" ./scripts/build/binary; \
+	cp -avlL build/docker /usr/local/bin/; \
 	docker --version; \
 	ldd /usr/local/bin/docker || :