I am trying to compile libvirt from source but being trapped with following error message when running ninja -C build

ninja -C build
ninja: Entering directory `build'
[1/12] Generating virkeyname-osx.html with a meson_exe.py custom command
FAILED: docs/manpages/virkeyname-osx.html
/home/sjt/.local/bin/meson --internal exe --capture docs/manpages/virkeyname-osx.html -- /usr/bin/xsltproc --stringparam pagesrc docs/manpages/virkeyname-osx.rst --stringparam builddir /home/sjt/src/c/libvirt/build --stringparam timestamp 'Thu Jun  3 23:11:25 2021 UTC' --nonet ../docs/subsite.xsl docs/manpages/virkeyname-osx.html.in
docs/manpages/virkeyname-osx.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeyname-osx --subtitle=Key name values for os
             ^
docs/manpages/virkeyname-osx.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeyname-osx --subtitle=Key name values for os
                        ^
docs/manpages/virkeyname-osx.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeyname-osx --subtitle=Key name values for os
                                               ^
unable to parse docs/manpages/virkeyname-osx.html.in
[2/12] Generating virkeycode-usb.html with a meson_exe.py custom command
FAILED: docs/manpages/virkeycode-usb.html
/home/sjt/.local/bin/meson --internal exe --capture docs/manpages/virkeycode-usb.html -- /usr/bin/xsltproc --stringparam pagesrc docs/manpages/virkeycode-usb.rst --stringparam builddir /home/sjt/src/c/libvirt/build --stringparam timestamp 'Thu Jun  3 23:11:25 2021 UTC' --nonet ../docs/subsite.xsl docs/manpages/virkeycode-usb.html.in
docs/manpages/virkeycode-usb.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeycode-usb --subtitle=Key code values for us
             ^
docs/manpages/virkeycode-usb.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeycode-usb --subtitle=Key code values for us
                        ^
docs/manpages/virkeycode-usb.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeycode-usb --subtitle=Key code values for us
                                               ^
unable to parse docs/manpages/virkeycode-usb.html.in
[3/12] Generating virkeycode-atset1.html with a meson_exe.py custom command
FAILED: docs/manpages/virkeycode-atset1.html
/home/sjt/.local/bin/meson --internal exe --capture docs/manpages/virkeycode-atset1.html -- /usr/bin/xsltproc --stringparam pagesrc docs/manpages/virkeycode-atset1.rst --stringparam builddir /home/sjt/src/c/libvirt/build --stringparam timestamp 'Thu Jun  3 23:11:25 2021 UTC' --nonet ../docs/subsite.xsl docs/manpages/virkeycode-atset1.html.in
docs/manpages/virkeycode-atset1.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeycode-atset1 --subtitle=Key code values for
             ^
docs/manpages/virkeycode-atset1.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeycode-atset1 --subtitle=Key code values for
                        ^
docs/manpages/virkeycode-atset1.html.in:17: parser error : Double hyphen within comment: <!-- This file is auto-generated from keymaps.csv
Data
  keymap-gen --lang=rst --title=virkeycode-atset1 --subtitle=Key code values for
                                                  ^
unable to parse docs/manpages/virkeycode-atset1.html.in
[4/12] Generating virkeycode-xtkbd.html with a meson_exe.py custom command
FAILED: docs/manpages/virkeycode-xtkbd.html
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