tce-load -i compiletc meson gjs-dev telepathy-glib-dev gobject-introspection-dev gettext desktop-file-utils appstream-glib gtk3-gir telepathy-glib-gir itstool

cd polari-3.28.0

mkdir build
cd build

CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain

ninja
sudo ninja install

$ polari

(org.gnome.Polari:29354): Gjs-WARNING **: JS ERROR: TelepathyGLib.Error: Protocol 'irc' not found on CM 'idle'
ConnectionsList<._onRowActivated/<@resource:///org/gnome/Polari/js/connections.js:159
main@resource:///org/gnome/Polari/js/main.js:17
run@resource:///org/gnome/gjs/modules/package.js:192
start@resource:///org/gnome/gjs/modules/package.js:176