these 2 derivations will be built:
  /nix/store/r7zf5jhxydw5as0ywnscalglgsvjf2f3-stylized_demo.zip.drv
  /nix/store/3m7hh9x2f7hmrw1mp28br4jg61pkina2-ue4demos-stylized_demo.drv
building '/nix/store/r87zskgcqr4il35l6pkswvvfyh3alxv3-stylized_demo.zip.drv'
stylized_demo.zip> 
stylized_demo.zip> trying https://ludios.org/mirror/ue4demos/stylized_demo.zip
stylized_demo.zip>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
stylized_demo.zip>                                  Dload  Upload   Total   Spent    Left  Speed
stylized_demo.zip> 100 71.1M  100 71.1M    0     0  12.6M      0  0:00:05  0:00:05 --:--:-- 13.9M
building '/nix/store/3m7hh9x2f7hmrw1mp28br4jg61pkina2-ue4demos-stylized_demo.drv'
ue4demos-stylized_demo> Archive:  /nix/store/4246hj373ljm1b0b1p2ir94yz9gnpb32-stylized_demo.zip
ue4demos-stylized_demo>    creating: Stylized Demo/
ue4demos-stylized_demo>    creating: Stylized Demo/Engine/
ue4demos-stylized_demo>    creating: Stylized Demo/Engine/Binaries/
ue4demos-stylized_demo>    creating: Stylized Demo/Engine/Binaries/Linux/
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/Stylized  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libicudata.so  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libicui18n.so  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libicuio.so  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libicule.so  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libiculx.so  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libicutu.so  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libicuuc.so  
ue4demos-stylized_demo>   inflating: Stylized Demo/Engine/Binaries/Linux/libopenal.so.1  
ue4demos-stylized_demo>    creating: Stylized Demo/Stylized/
ue4demos-stylized_demo>    creating: Stylized Demo/Stylized/Content/
ue4demos-stylized_demo>    creating: Stylized Demo/Stylized/Content/Paks/
ue4demos-stylized_demo>   inflating: Stylized Demo/Stylized/Content/Paks/Stylized-LinuxNoEditor.pak  
ue4demos-stylized_demo>    creating: Stylized Demo/Stylized/Saved/
ue4demos-stylized_demo>    creating: Stylized Demo/Stylized/Saved/Config/
ue4demos-stylized_demo>   inflating: Stylized Demo/Stylized/Saved/Config/controller.vdf  
ue4demos-stylized_demo> Stylized Demo

upload niks3: ok