these 2 derivations will be built:
  /nix/store/khd980capxssblhlz9xmv0hbbz3d1a70-landscape_mountains.zip.drv
  /nix/store/8f9d3bcvjmpvvpab15vg5v2cgfyk50br-ue4demos-landscape_mountains.drv
building '/nix/store/hlwx8bwq4n5r0gd23mn5w0adhn45ijlx-landscape_mountains.zip.drv'
landscape_mountains.zip> 
landscape_mountains.zip> trying https://ludios.org/mirror/ue4demos/landscape_mountains.zip
landscape_mountains.zip>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
landscape_mountains.zip>                                  Dload  Upload   Total   Spent    Left  Speed
landscape_mountains.zip> 100  417M  100  417M    0     0  26.8M      0  0:00:15  0:00:15 --:--:-- 26.7M
building '/nix/store/8f9d3bcvjmpvvpab15vg5v2cgfyk50br-ue4demos-landscape_mountains.drv'
ue4demos-landscape_mountains> Archive:  /nix/store/c59ayddp6ssyykccvwrvf904n24vkqny-landscape_mountains.zip
ue4demos-landscape_mountains>    creating: LandscapeMountains/
ue4demos-landscape_mountains>    creating: LandscapeMountains/Engine/
ue4demos-landscape_mountains>    creating: LandscapeMountains/Engine/Binaries/
ue4demos-landscape_mountains>    creating: LandscapeMountains/Engine/Binaries/Linux/
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/LandscapeMountains  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libicudata.so  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libicui18n.so  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libicuio.so  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libicule.so  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libiculx.so  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libicutu.so  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libicuuc.so  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/Engine/Binaries/Linux/libopenal.so.1  
ue4demos-landscape_mountains>    creating: LandscapeMountains/LandscapeMountains/
ue4demos-landscape_mountains>    creating: LandscapeMountains/LandscapeMountains/Content/
ue4demos-landscape_mountains>    creating: LandscapeMountains/LandscapeMountains/Content/Paks/
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Content/Paks/LandscapeMountains-LinuxNoEditor.pak  
ue4demos-landscape_mountains>    creating: LandscapeMountains/LandscapeMountains/Saved/
ue4demos-landscape_mountains>    creating: LandscapeMountains/LandscapeMountains/Saved/Config/
ue4demos-landscape_mountains>    creating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/Compat.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/DeviceProfiles.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/EditorUserSettings.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/Engine.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/Game.ini  
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/GameUserSettings.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/Input.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/Lightmass.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/CleanSourceConfigs/Scalability.ini  
ue4demos-landscape_mountains>    creating: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/Compat.ini  
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/DeviceProfiles.ini  
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/EditorUserSettings.ini  
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/Engine.ini  
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/Game.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/GameUserSettings.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/Input.ini  
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/Lightmass.ini  
ue4demos-landscape_mountains>  extracting: LandscapeMountains/LandscapeMountains/Saved/Config/LinuxNoEditor/Scalability.ini  
ue4demos-landscape_mountains>   inflating: LandscapeMountains/LandscapeMountains/Saved/Config/controller.vdf  

upload niks3: ok