Big Sur - <X11/Xft/Xft.h> error cairo-xlib

[gvtemp43]

% brew install conky-all
==> Installing conky-all from conky-for-macos/formulae
Warning: Calling depends_on :x11 is deprecated! Use depends_on specific X11 formula(e) instead.
Please report this issue to the conky-for-macos/formulae tap (not Homebrew/brew or Homebrew/core), or even better, submit a PR to fix it:
/usr/local/Homebrew/Library/Taps/conky-for-macos/homebrew-formulae/Formula/cairo-xlib.rb:20

==> Downloading https://github.com/npyl/npyl.github.io/raw/master/Projects/conky/conky-1.11.1.tar.gz
Already downloaded: /Users/xxx/Library/Caches/Homebrew/downloads/6babea57848a5b09a5bc77a35cd6fdfe9e0973421f265d70305d3e445da173bb--conky-1.11.1.tar.gz
Warning: Calling depends_on :x11 is deprecated! Use depends_on specific X11 formula(e) instead.
Please report this issue to the conky-for-macos/formulae tap (not Homebrew/brew or Homebrew/core), or even better, submit a PR to fix it:
/usr/local/Homebrew/Library/Taps/conky-for-macos/homebrew-formulae/Formula/cairo-xlib.rb:20

==> MACOSX_DEPLOYMENT_TARGET=10.10 cmake .. -DBUILD_WLAN=ON -DBUILD_MYSQL=ON
==> make -j4 install
Last 15 lines from /Users/xxx/Library/Logs/Homebrew/conky-all/02.make:
[ 30%] Built target conky-imlib2
[ 31%] Patching libcairo-orig.c
Scanning dependencies of target conky-cairo
[ 32%] Building C object lua/CMakeFiles/conky-cairo.dir/libcairo.c.o
In file included from /tmp/conky-all-20210120-17917-ammzsv/conky-for-macOS/src/colours.cc:32:
/tmp/conky-all-20210120-17917-ammzsv/conky-for-macOS/src/x11.h:35:10: fatal error: 'X11/Xft/Xft.h' file not found
#include <X11/Xft/Xft.h>
^~~~~~~~~~~~~~~
1 error generated.
make[2]: *** [src/CMakeFiles/conky.dir/colours.cc.o] Error 1
make[1]: *** [src/CMakeFiles/conky.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 33%] Linking C shared library libcairo.dylib
[ 33%] Built target conky-cairo
make: *** [all] Error 2

If reporting this issue please do so at (not Homebrew/brew or Homebrew/core):
https://github.com/conky-for-macos/homebrew-formulae/issues