diff --git a/tests/as-debootstrap-unshare-wrapper b/tests/as-debootstrap-unshare-wrapper
index 030696d..6c88564 100644
--- a/tests/as-debootstrap-unshare-wrapper
+++ b/tests/as-debootstrap-unshare-wrapper
@@ -35,8 +35,15 @@ if [ -n "$AUTOPROXY" ] && [ -x "$AUTOPROXY" ] && [ -e /tmp/.auto-apt-proxy-0 ];
 	chmod 644 "$TMP_APT_CONFIG"
 fi
 
+# debootstrap runs mount -t proc proc /proc which doesn't work in an unshared
+# namespace on privileged docker (like salsaci), so mount /proc manually
+# https://bugs.debian.org/1031222
+# https://salsa.debian.org/installer-team/debootstrap/-/merge_requests/91
 $prefix {{ CMD }} --variant=custom --mode={{ MODE }} \
 	--setup-hook='env '"${AUTOPROXY:+APT_CONFIG='$TMP_APT_CONFIG'}"' container=lxc debootstrap --variant={{ VARIANT }} unstable "$1" {{ MIRROR }}' \
+	--setup-hook='mount -o rbind /proc "$1/proc"' \
+	--setup-hook='chroot "$1" dpkg-reconfigure systemd || true' \
+	--setup-hook='umount --lazy "$1/proc"' \
 	- /tmp/debian-mm.tar {{ MIRROR }}
 if [ -n "$AUTOPROXY" ] && [ -x "$AUTOPROXY" ] && [ -e /tmp/.auto-apt-proxy-0 ]; then
 	rm "$TMP_APT_CONFIG"