diff --git a/Dockerfile b/Dockerfile
index a435359..b9fc4df 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,9 @@
 ARG GO_VERSION=1.21
 
-FROM golang:${GO_VERSION} AS build
+FROM --platform=${BUILDPLATFORM} golang:${GO_VERSION} AS build
 COPY . /go/src/github.com/cpuguy83/go-md2man
 WORKDIR /go/src/github.com/cpuguy83/go-md2man
+ARG TARGETOS TARGETARCH TARGETVARIANT
 RUN \
     --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
diff --git a/Makefile b/Makefile
index 8716c00..8791b4c 100644
--- a/Makefile
+++ b/Makefile
@@ -29,9 +29,6 @@ ifneq ($(GOARM),)
 	export GOARM
 endif
 
-vars:
-	@go env
-
 .PHONY:
 build: bin/go-md2man