Boot the vm, attaching the inputs as disks

.gitignore

@@ -0,0 +1 @@
+*.nar

Makefile

@@ -1,2 +1,8 @@
-all:
+all: hello.nar /etc/guix/signing-key.pub Makefile
-	"$$(guix system vm-image config.scm)"
+	qemu-system-x86_64 -enable-kvm -m 256 \
+	  "$$(guix system vm-image config.scm)" \
+	  -drive format=raw,readonly,file=hello.nar,index=0,if=ide,index=1,media=disk \
+	  -drive format=raw,readonly,file=/etc/guix/signing-key.pub,index=0,if=ide,index=2,media=disk
+
+%.nar: Makefile
+	guix archive --export --recursive $* > $@