pisa@makoto 07:40:33/210504(~)% tail -2 /usr/pkg/etc/pkgin/repositories.conf 
# NetBSD OS release can look like 6.0_STABLE, do not use it as-is
http://cdn.NetBSD.org/pub/pkgsrc/packages/NetBSD/amd64/9.0_current/All

pisa@makoto 07:40:52/210504(~)% pkgin install asciidoc
pkgin: You don't have enough rights for this operation.
pisa@makoto 07:41:05/210504(~)% sudo pkgin install asciidoc
calculating dependencies...done.

6 packages to refresh:
  python38-3.8.8 xmlcatmgr-2.2nb1 perl-5.32.1 libxml2-2.9.10nb3 libgcrypt-1.9.2
  libuuid-2.32.1

5 packages to install:
  asciidoc-9.1.0 libxslt-1.1.34nb4 getopt-1.1.6 docbook-xsl-1.79.2nb4
  docbook-xml-4.5

6 to refresh, 0 to upgrade, 5 to install
31M to download, 22M to install

proceed ? [Y/n] 
xmlcatmgr-2.2nb1.tgz                          100%   25KB  24.6KB/s   00:00    
perl-5.32.1.tgz                               100%   11MB 330.6KB/s   00:35    
docbook-xml-4.5.tgz                           100%   81KB  81.3KB/s   00:00    
libxml2-2.9.10nb3.tgz                         100% 1390KB 154.4KB/s   00:09    
libgcrypt-1.9.2.tgz                           100%  624KB 623.7KB/s   00:01    
libuuid-2.32.1.tgz                            100%   28KB  28.4KB/s   00:00    
python38-3.8.8.tgz                            100%   16MB   1.1MB/s   00:15    
libxslt-1.1.34nb4.tgz                         100%  411KB 411.0KB/s   00:00    
getopt-1.1.6.tgz                              100%   13KB  13.1KB/s   00:00    
docbook-xsl-1.79.2nb4.tgz                     100% 1312KB   1.3MB/s   00:01    
asciidoc-9.1.0.tgz                            100%  347KB 346.6KB/s   00:00    
installing asciidoc-9.1.0...
refreshing python38-3.8.8...
installing libxslt-1.1.34nb4...
installing getopt-1.1.6...
installing docbook-xsl-1.79.2nb4...
refreshing xmlcatmgr-2.2nb1...
===========================================================================
The following files are no longer being used by xmlcatmgr-2.2nb1,
and they can be removed if no other packages are using them:

        /usr/pkg/share/xml/catalog

===========================================================================
xmlcatmgr-2.2nb1: copying /usr/pkg/share/examples/xmlcatmgr/catalog.etc.sgml to /usr/pkg/etc/sgml/catalog
xmlcatmgr-2.2nb1: copying /usr/pkg/share/examples/xmlcatmgr/catalog.etc.xml to /usr/pkg/etc/xml/catalog
xmlcatmgr-2.2nb1: copying /usr/pkg/share/examples/xmlcatmgr/catalog.share.sgml to /usr/pkg/share/sgml/catalog
xmlcatmgr-2.2nb1: /usr/pkg/share/xml/catalog already exists
refreshing perl-5.32.1...
installing docbook-xml-4.5...
refreshing libxml2-2.9.10nb3...
refreshing libgcrypt-1.9.2...
libgcrypt-1.9.1: unregistering info file /usr/pkg/info/gcrypt.info
libgcrypt-1.9.2: registering info file /usr/pkg/info/gcrypt.info
refreshing libuuid-2.32.1...
pkg_install warnings: 15, errors: 0
pkg_install error log can be found in /var/db/pkgin/pkg_install-err.log
reading local summary...
processing local summary...
marking asciidoc-9.1.0 as non auto-removable
pisa@makoto 07:44:15/210504(~)% 

mkdir asciidoc
cd asciidoc
cat > asciidoc/hello-world
Hello World
^D
cat asciidoc/hello-world
Hello World

asciidoc hello-world
w3m hello-world.html