Package xdmcp was not found in the pkg-config search path.
Perhaps you should add the directory containing `xdmcp.pc'
to the PKG_CONFIG_PATH environment variable
Package 'xdmcp', required by 'xcb', not found
...
-- Checking for modules 'camel-1.2>=3.42.4;libebook-1.2>=3.42.4;libecal-2.0>=3.42.4;libedataserver-1.2>=3.42.4;libedataserverui-1.2>=3.42.4;libebackend-1.2>=3.42.4'
--   Requested 'camel-1.2 >= 3.42.4' but version of camel is 3.42.3
--   Requested 'libebook-1.2 >= 3.42.4' but version of libebook is 3.42.3
--   Requested 'libecal-2.0 >= 3.42.4' but version of libecal is 3.42.3
--   Requested 'libedataserver-1.2 >= 3.42.4' but version of libedataserver is 3.42.3
--   Requested 'libedataserverui-1.2 >= 3.42.4' but version of libedataserverui is 3.42.3
--   Requested 'libebackend-1.2 >= 3.42.4' but version of libebackend is 3.42.3
CMake Error at /nix/store/ilykjpp6m7brss45clmp2dxmlknvb2m4-cmake-3.21.2/share/cmake-3.21/Modules/FindPkgConfig.cmake:562 (message):
  A required package was not found

In reply to @hmenke:matrix.org
Julian Stecklina: Replying to spam 😄 What's the program you are using for screen recording, please?

In reply to @jtojnar:matrix.org
Julian Stecklina: it might also be the compositing issue again, could you try the fix from https://github.com/NixOS/nixpkgs/issues/32580#issuecomment-350877197