[docs] update build instructions

docs/manual/faq.rst

@@ -172,36 +172,6 @@ Where are the log files for Qtile?
 
 The log files for qtile are at ``~/.local/share/qtile/qtile.log``.
 
-Why do I get an ``AttributeError`` when building Qtile?
-=======================================================
-
-If you see this message:
-``AttributeError: cffi library 'libcairo.so.2' has no function, constant or global variable named 'cairo_xcb_surface_create'``
-when building Qtile then your Cairo version lacks XCB support.
-
-If it happens, it might be because the ``cairocffi`` and ``xcffib`` dependencies
-were installed in the wrong order.
-
-To fix this:
-
-1. uninstall them from your environment: with ``pip uninstall cairocffi xcffib``
-   if using a virtualenv, or with your system package-manager if you installed
-   the development version of Qtile system-wide.
-#. re-install them sequentially (again, with pip or with your package-manager)::
-
-    pip install xcffib
-    pip install --no-cache-dir cairocffi
-
-See `this issue comment`_ for more information.
-
-.. _`this issue comment`: https://github.com/qtile/qtile/issues/994#issuecomment-497984551
-
-If you are using your system package-manager and the issue still happens,
-the packaging of ``cairocffi`` might be broken for your distribution.
-Try to contact the persons responsible for ``cairocffi``'s packaging
-on your distribution, or to install it from the sources with ``xcffib``
-available.
-
 How can I match the bar with picom?
 ===================================
 

docs/manual/install/index.rst

@@ -57,9 +57,7 @@ only the dependencies of one of these is required.
 +-------------------+-------------------------+-----------------------------------------+
 | CFFI_             | python3-cffi            | Bars and popups                         |
 +-------------------+-------------------------+-----------------------------------------+
-| cairocffi_        | python3-cairocffi       | Drawing on bars and popups (if using    |
-|                   |                         | X11 install xcffib BEFORE installing    |
-|                   |                         | cairocffi, see below)                   |
+| cairocffi_        | python3-cairocffi       | Drawing on bars and popups              |
 +-------------------+-------------------------+-----------------------------------------+
 | libpangocairo     | libpangocairo-1.0-0     | Writing on bars and popups              |
 +-------------------+-------------------------+-----------------------------------------+
@@ -93,20 +91,6 @@ only the dependencies of one of these is required.
 .. _dbus-next: https://python-dbus-next.readthedocs.io/en/latest/index.html
 
 
-cairocffi
----------
-
-Qtile uses cairocffi_ for drawing on status bars and popup windows. Under X11,
-cairocffi requires XCB support via xcffib, which you should be sure to have
-installed **before** installing cairocffi; otherwise, the needed cairo-xcb
-bindings will not be built. Once you've got the dependencies installed, you can
-use the latest version on PyPI:
-
-.. code-block:: bash
-
-    pip install --no-cache-dir cairocffi
-
-
 Qtile
 -----
 
@@ -131,11 +115,7 @@ Or install qtile-git with:
     git clone https://github.com/qtile/qtile.git
     cd qtile
     pip install .
-
-As long as the necessary libraries are in place, this can be done at any point,
-however, it is recommended that you first install xcffib to ensure the
-cairo-xcb bindings are built (X11 only) (see above).
-
+    pip install --config-setting backend=wayland .  # adds wayland dependencies
 
 .. _starting-qtile: