diff --git a/Makefile b/Makefile
index 0747d6f..4f66a07 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ source:
 	python3 setup.py sdist
 
 manylinux:
-	docker run --rm -e PLAT=$(POLICY) -v $(PWD):/io -w /io quay.io/pypa/$(POLICY)_$(ARCH) \
+	docker run --rm -v $(PWD):/io -w /io quay.io/pypa/$(POLICY)_$(ARCH) \
 	    make build-wheels \
             POLICY=$(POLICY) ARCH=$(ARCH) TAGS="$(TAGS)"