Your system information

• Steam client version (build number or date):
  Built: Jan 16 2020, at 03:34:03
  Steam API: v020
  Steam package versions: 1579321278

• Distribution (e.g. Ubuntu):
  NixOS 19.03

• Opted into Steam client beta?: [Yes/No]
  I don't know; how do I find out?

• Have you checked for system updates?: [Yes/No]
  Yes

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist

Pressing play button fails to launch game. The play button changes from "PLAY" to "LAUNCHING" for a second and then back to "PLAY". I expected the game to launch. Sorry this is my first time using Steam...

I have tried with two games:

• "Cities: Skylines"
• "You Have to Win the Game"

Steps for reproducing this issue:

1. Navigate to game from library
2. Click the Play button

The console shows the following output immediately after clicking play:

STEAM_RUNTIME_HEAVY: ./steam-runtime-heavy
./steamwebhelper: symbol lookup error: ./libcef.so: undefined symbol: FcConfigGetSysRoot
Launching appid 286100
GameAction [AppID 286100, ActionID 1] : LaunchApp changed task to BPMHybridOverlay10ftShutdown with ""
GameAction [AppID 286100, ActionID 1] : LaunchApp changed task to ProcessingInstallScript with ""
Slow image load - /home/corin/.local/share/Steam/tenfoot/resource/images/library/play_action_modal_mask.png (dimensions 1920x1080, took 28 msec)
GameAction [AppID 286100, ActionID 1] : LaunchApp changed task to SynchronizingCloud with ""
GameAction [AppID 286100, ActionID 1] : LaunchApp changed task to SiteLicenseSeatCheckout with ""
GameAction [AppID 286100, ActionID 1] : LaunchApp changed task to CreatingProcess with ""
GameAction [AppID 286100, ActionID 1] : LaunchApp waiting for user response to CreatingProcess ""
GameAction [AppID 286100, ActionID 1] : LaunchApp continues with user response "CreatingProcess"
Opted-in Controller Mask for AppId 286100: 0
Game update: AppID 286100 "", ProcID 22894, IP 0.0.0.0:0
Starting app 286100
Installing breakpad exception handler for appid(steam)/version(1579321278)
>>> Adding process 22894 for game ID 286100
ERROR: ld.so: object '/home/corin/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
GameAction [AppID 286100, ActionID 1] : LaunchApp changed task to WaitingGameWindow with ""
GameAction [AppID 286100, ActionID 1] : LaunchApp changed task to Completed with ""
ERROR: ld.so: object '/home/corin/.local/share/Steam/ubuntu12_64/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
/home/corin/.local/share/Steam/steamapps/common/You Have to Win the Game/TheGame_NFML: error while loading shared libraries: libsteam_api.so: cannot open shared object file: No such file or directory
>>> Adding process 22895 for game ID 286100
Game removed: AppID 286100 "", ProcID 22894 
Uploaded AppInterfaceStats to Steam
Exiting app 286100
No cached sticky mapping in ActivateActionSet.