+# Precreate any files necessary.
+rm -rf 6200-vddk.d/mp
+mkdir 6200-vddk.d/mp
+#rm -f 6200-vddk.d/fedora.vmdk
+#unxz --keep 6200-vddk.d/fedora.vmdk.xz
+
+# Run techtalk. The demos require nbdkit 1.15.6, libnbd 1.1.5, and qemu 4.2,
+# which are not present in Fedora 30, so point to self-built versions.
+export PATH=$HOME/d/nbdkit:$HOME/d/qemu:$PATH
+$HOME/d/libnbd/run techtalk-pse