message: Add dependency to FreeBSD-specific setup
  Fixes problem I had with issue should be better documented.
diff: @@ -127,7 +127,7 @@ command that should install all of them. If something is still found to be
  missing, please open an issue.
  ```sh
  -pkg install cmake freetype2 fontconfig xclip
  +pkg install cmake freetype2 fontconfig xclip pkgconf
  ```
  #### Other
  