After installing app-text/asciidoc it works properly. ... * python3_5: running distutils-r1_run_phase python_compile_all make -j2 -j1 docs mkdir -p ./docs/man/man1/ ; \ PYTHONPATH=./lib docs/bin/generate_man.py --template-file=docs/templates/man.j2 --output-dir=docs/man/man1/ --output-format man lib/ansible/cli/*.py [WARNING]: log file at /var/log/ansible.log is not writeable and we cannot create it, aborting Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-galaxy.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-console.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-pull.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-doc.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-inventory.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-playbook.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-vault.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible.1.asciidoc.in Wrote doc to /var/tmp/portage/app-admin/ansible-9999/work/ansible-9999/docs/man/man1/ansible-config.1.asciidoc.in make ./docs/man/man1/ansible-vault.1 ./docs/man/man1/ansible.1 ./docs/man/man1/ansible-playbook.1 ./docs/man/man1/ansible-config.1 ./docs/man/man1/ansible-inventory.1 ./docs/man/man1/ansible-console.1 ./docs/man/man1/ansible-doc.1 ./docs/man/man1/ansible-pull.1 ./docs/man/man1/ansible-galaxy.1 make[1]: Entering directory '/var/tmp/portage/app-admin/ansible-9999/work/ansible-9999' sed "s/%VERSION%/2.6.0/" docs/man/man1/ansible-vault.1.asciidoc.in > docs/man/man1/ansible-vault.1.asciidoc ERROR: AsciiDoc 'a2x' command is not installed but is required to build ./docs/man/man1/ansible-vault.1 ./docs/man/man1/ansible.1 ./docs/man/man1/ansible-playbook.1 ./docs/man/man1/ansible-config.1 ./docs/man/man1/ansible-inventory.1 ./docs/man/man1/ansible-console.1 ./docs/man/man1/ansible-doc.1 ./docs/man/man1/ansible-pull.1 ./docs/man/man1/ansible-galaxy.1 make[1]: *** [Makefile:151: docs/man/man1/ansible-vault.1] Error 1 rm docs/man/man1/ansible-vault.1.asciidoc make[1]: Leaving directory '/var/tmp/portage/app-admin/ansible-9999/work/ansible-9999' make: *** [Makefile:355: docs] Error 2 * ERROR: app-admin/ansible-9999::gentoo failed (compile phase): * emake failed * * If you need support, post the output of `emerge --info '=app-admin/ansible-9999::gentoo'`, * the complete build log and the output of `emerge -pqv '=app-admin/ansible-9999::gentoo'`. * The complete build log is located at '/var/tmp/portage/app-admin/ansible-9999/temp/build.log'. * The ebuild environment file is located at '/var/tmp/portage/app-admin/ansible-9999/temp/environment'. * Working directory: '/var/tmp/portage/app-admin/ansible-9999/work/ansible-9999' * S: '/var/tmp/portage/app-admin/ansible-9999/work/ansible-9999'