In OBS (e.g. https://build.opensuse.org/project/show/zypp:TW) gcc complains:

  pk-backend-zypp.cpp:614:25: error: reference to 'filesystem' is ambiguous
        filesystem::Pathname pathname("/");
  note: candidates are: 'namespace zypp::filesystem { }'
  note:                 'namespace std::filesystem { }'

Similar for several other usages of 'filesystem::*'. A 'using zypp:filesystem'
may help or they need to be fully qualified as 'zypp::filesystem'.

Bug ID	1206687
Summary	pk-backend-zypp must disambiguate namespace filesystem
Classification	openSUSE
Product	openSUSE Tumbleweed
Version	Current
Hardware	Other
OS	Other
Status	NEW
Severity	Normal
Priority	P5 - None
Component	GNOME
Assignee	gnome-bugs@suse.de
Reporter	ma@suse.com
QA Contact	qa-bugs@suse.de
Found By	---
Blocker	---