openraPackages.mods.mw build from commit 0d9c033f628fe8798eab120c968e3cb45184740b crashes on NixOS 19.03pre166308.626233eee6e. Same commit, manually built on Arch Linux, launches, via launch-game.sh, without any apparent issues.

exception-2019-01-16T180255Z.log

OpenRA engine version 2778685
Date: 2019-01-16 18:02:55Z
Operating System: Linux (Unix 4.19.14.0)
Runtime Version: Mono 5.16.0.220 (tarball Sun Jan  6 14:59:55 UTC 2019) CLR 4.0.30319.42000
Exception of type `System.InvalidOperationException`: Unable to find a sprite loader for type 'PngSheet'.
  at OpenRA.ObjectCreator.GetLoaders[TLoader] (System.Collections.Generic.IEnumerable`1[T] formats, System.String name) [0x0006d] in <be71fd68dc534abca1f0275e110c58e4>:0 
  at OpenRA.ModData..ctor (OpenRA.Manifest mod, OpenRA.InstalledMods mods, System.Boolean useLoadScreen) [0x00147] in <be71fd68dc534abca1f0275e110c58e4>:0 
  at OpenRA.Game.InitializeMod (System.String mod, OpenRA.Arguments args) [0x00189] in <be71fd68dc534abca1f0275e110c58e4>:0 
  at OpenRA.Game.Initialize (OpenRA.Arguments args) [0x004c7] in <be71fd68dc534abca1f0275e110c58e4>:0 
  at OpenRA.Game.InitializeAndRun (System.String[] args) [0x00007] in <be71fd68dc534abca1f0275e110c58e4>:0 
  at OpenRA.Program.Main (System.String[] args) [0x0004e] in <be71fd68dc534abca1f0275e110c58e4>:0 

geoip.log

DatabaseReader failed: System.IO.FileNotFoundException: Could not find file "/nix/store/mr45jxxq5svkn1gc6j12cx0zbxjx3j04-openra-mw-251/lib/openra-mw/GeoLite2-Country.mmdb.gz"
File name: '/nix/store/mr45jxxq5svkn1gc6j12cx0zbxjx3j04-openra-mw-251/lib/openra-mw/GeoLite2-Country.mmdb.gz'
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) [0x00259] in /build/mono-5.16.0.220/mcs/class/corlib/System.IO/FileStream.cs:274 
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean isAsync, System.Boolean anonymous) [0x00000] in /build/mono-5.16.0.220/mcs/class/corlib/System.IO/FileStream.cs:149 
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access) [0x00000] in /build/mono-5.16.0.220/mcs/class/corlib/System.IO/FileStream.cs:86 
  at (wrapper remoting-invoke-with-check) System.IO.FileStream..ctor(string,System.IO.FileMode,System.IO.FileAccess)
  at OpenRA.Network.GeoIP.Initialize () [0x00002] in <be71fd68dc534abca1f0275e110c58e4>:0