Bug#966816: /lib/systemd/system/blk-availability.service:10: Neither a valid executable name nor an absolute path: ${exec_prefix}/bin/true

[Tom Overlund]

I know Debian is a volunteer project, but it seems like bad form when a 
package-breaking bug is reported on the 
same day it is introduced, a trivial fix is availble, and 11 days later the 
package is still broken. One 
maintainer can trivially fix this, but in the meantime an untold number of 
people run across this error and have 
to spend time tracking it down.