UPX in Docker breaks Go app

app.go

package main

import (
	"fmt"
)

func main() {
	fmt.Println("Hello Docker");
}

Dockerfile

# Build app
FROM golang as builder
COPY . /build
RUN cd /build && CGO_ENABLED=0 go build -ldflags='-s -w' app.go

# Compress
FROM lalyos/upx as compressor
COPY --from=builder /build/app /compress/
RUN ["upx", "/compress/app"]

# Create empty image with only the app in it
FROM scratch
COPY --from=compressor /compress/app /
# COPY --from=builder /build/app /
ENTRYPOINT ["/app"]