buildx failed with: ERROR: failed to solve: process "/bin/sh -c test -n \"${BUILD_VERSION}\" \t&& apk update \t&& apk upgrade -a \t&& apk add --no-cache ca-certificates curl gcc musl-dev \t&& update-ca-certificates \t&& curl -L \"${ARCHIVE_URL}${BUILD_VERSION}.tar.gz\" -o /tmp/nebula.tar.gz \t&& tar xzf /tmp/nebula.tar.gz --strip 1 -C /go/src/github.com/slackhq/nebula \t&& go get -u google.golang.org/protobuf golang.org/x/crypto golang.org/x/net \t&& go mod tidy \t&& go build -o ./nebula -v -trimpath -ldflags=\"-s -w -X main.Build=${BUILD_VERSION}\" ./cmd/nebula \t&& go build -o ./nebula-cert -v -trimpath -ldflags=\"-s -w -X main.Build=${BUILD_VERSION}\" ./cmd/nebula-cert" did not complete successfully: exit code: 4