Hi Claus,
I installed qemu-user-static, first step was fine however i'm getting the following error after 2nd step
MLD> docker build -t mld/devel:5.4 /root/devel
Sending build context to Docker daemon 2.56kB
Step 1/7 : FROM arm32v7/debian:stretch
---> 987931aaa176
Step 2/7 : COPY qemu-arm-static /usr/bin
COPY failed: stat /var/lib/docker/tmp/docker-builder355111293/qemu-arm-static: no such file or directory