$6 = ("/gnu/store/0g109wish1wxz05wyr7m66z25szk72dx-qemu-minimal-10.1.0/bin/qemu-system-x86_64" "-m" "3500" "--device" "rtl8139,netdev=net0" "--netdev" "user,id=net0,hostfwd=tcp:127.0.0.1:11004-:1004,hostfwd=tcp:127.0.0.1:10022-:22,hostfwd=tcp:127.0.0.1:15900-:5900" "--snapshot" "--hda" "/gnu/store/r4gabjwgygx7szd7msp49ya6svjdq56w-disk-image" "--no-reboot" "--enable-kvm")
scheme@(guile-user)> (apply system* "qemu-system-x86_64" $6)
qemu-system-x86_64: --hda /gnu/store/r4gabjwgygx7szd7msp49ya6svjdq56w-disk-image: drive with bus=0, unit=0 (index=0) exists
$7 = 256