pass DOCKER_CROSSPLATFORMS to the container in the Makefile
@@ -23,6 +23,7 @@ DOCKER_ENVS := \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_PKGS \
+ -e DOCKER_CROSSPLATFORMS \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \