docker: install qemu-user-static from backports

docker/Dockerfile

@@ -59,10 +59,10 @@
 # Set HOME to a writable directory in case something wants to cache things
 ENV HOME=/tmp
 
 LABEL org.label-schema.name "debos"
 LABEL org.label-schema.description "Debian OS builder"
 LABEL org.label-schema.vcs-url = "https://github.com/go-debos/debos"
 LABEL org.label-schema.docker.cmd 'docker run \
   --rm \
   --interactive \
   --tty \
@@ -98,7 +98,6 @@
         openssh-client \
         parted \
         pkg-config \
-        qemu-user-static \
         qemu-utils \
         rsync \
         systemd \
@@ -115,11 +114,11 @@
         arch-install-scripts && \
     rm -rf /var/lib/apt/lists/*
 
-# debian's qemu-user-static package no longer registers binfmts
-# if running inside a virtualmachine; dockerhub builds are inside a vm
-RUN for arch in aarch64 alpha arm armeb cris hexagon hppa m68k microblaze mips mips64 mips64el mipsel mipsn32 mipsn32el ppc ppc64 ppc64le riscv32 riscv64 s390x sh4 sh4eb sparc sparc32plus sparc64 xtensa xtensaeb; do \
-      update-binfmts --import qemu-$arch; \
-    done
+RUN echo "deb http://deb.debian.org/debian bookworm-backports main" > /etc/apt/sources.list.d/bookworm-backports.list && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends -t bookworm-backports \
+        qemu-user-static && \
+    rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder $GOPATH/bin/debos /usr/local/bin/debos
 

tests/debian/test.yaml

@@ -4,7 +4,7 @@ architecture: {{$architecture}}
 
 actions:
   - action: debootstrap
-    suite: bullseye
+    suite: bookworm
     variant: minbase
     merged-usr: true