WriteMakefile(
    ...,
    VERBINST            => 1,
    ...
);

##</code><code>##

$ perl Makefile.PL
WARNING: VERBINST is not a known parameter.
Checking if your kit is complete...
Looks good
'VERBINST' is not a known MakeMaker parameter name.
Generating a Unix-style Makefile
...

##</code><code>##

# --- MakeMaker tools_other section:
...
VERBINST = 0
...

##</code><code>##

# --- MakeMaker tools_other section:
...
VERBINST = 1
...

##</code><code>##

$ make install
Manifying 1 pod document
Installing /.../lib/site_perl/...pm
Installing /.../man/man3/...3pm
Writing /...packlist
Appending installation info to /.../perllocal.pod