install -Z returns an error "install: target '<target>' is not a directory

Issue

• The install commando returns an error when using the -Z option.
• To reproduce the error use the following example:

# install -Z system_u:object_r:etc_t:s0 -m 444 -o root -g root /etc/passwd /tmp/tmpfile

• This returns "install: target ‘/tmp/tmpfile’ is not a directory"
• The same example with --context works as expected:

# install --context=system_u:object_r:etc_t:s0 -m 444 -o root -g root /etc/passwd /tmp/tmpfile

• We use the install command with the long option --context, that works fine.