these 2 derivations will be built:
  /nix/store/z1wxgblxz2zs123hf7al9v723lk8q1cb-koboredux-0.7.5.1-Linux.tar.bz2.drv
  /nix/store/n2994aaw5wxzq4fjxkjy0i29b3ingfi4-koboredux-0.7.5.1.drv
building '/nix/store/lwiszqcy3ii4n083mhzmq15dgnq5fy0l-koboredux-0.7.5.1-Linux.tar.bz2.drv'
koboredux-0.7.5.1-Linux.tar.bz2> 
koboredux-0.7.5.1-Linux.tar.bz2> ***
koboredux-0.7.5.1-Linux.tar.bz2> Please purchase the game on https://olofson.itch.io/kobo-redux
koboredux-0.7.5.1-Linux.tar.bz2> and download the Linux build.
koboredux-0.7.5.1-Linux.tar.bz2> 
koboredux-0.7.5.1-Linux.tar.bz2> Once you have downloaded the file, please use the following command
koboredux-0.7.5.1-Linux.tar.bz2> and re-run the installation:
koboredux-0.7.5.1-Linux.tar.bz2> 
koboredux-0.7.5.1-Linux.tar.bz2> nix-prefetch-url file://$PWD/koboredux-0.7.5.1-Linux.tar.bz2
koboredux-0.7.5.1-Linux.tar.bz2> 
koboredux-0.7.5.1-Linux.tar.bz2> Alternatively, install the "koboredux-free" package, which replaces the
koboredux-0.7.5.1-Linux.tar.bz2> proprietary assets with a placeholder theme.
koboredux-0.7.5.1-Linux.tar.bz2> 
koboredux-0.7.5.1-Linux.tar.bz2> ***
koboredux-0.7.5.1-Linux.tar.bz2> 
error: Cannot build '/nix/store/lwiszqcy3ii4n083mhzmq15dgnq5fy0l-koboredux-0.7.5.1-Linux.tar.bz2.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/80xh7zyw9iq6y7wssgnvqklnki5y6jqn-koboredux-0.7.5.1-Linux.tar.bz2
       Last 15 log lines:
       >
       > ***
       > Please purchase the game on https://olofson.itch.io/kobo-redux
       > and download the Linux build.
       >
       > Once you have downloaded the file, please use the following command
       > and re-run the installation:
       >
       > nix-prefetch-url file://$PWD/koboredux-0.7.5.1-Linux.tar.bz2
       >
       > Alternatively, install the "koboredux-free" package, which replaces the
       > proprietary assets with a placeholder theme.
       >
       > ***
       >
       For full logs, run:
         nix log /nix/store/lwiszqcy3ii4n083mhzmq15dgnq5fy0l-koboredux-0.7.5.1-Linux.tar.bz2.drv
error: build of resolved derivation '/nix/store/lwiszqcy3ii4n083mhzmq15dgnq5fy0l-koboredux-0.7.5.1-Linux.tar.bz2.drv' failed
error: Cannot build '/nix/store/n2994aaw5wxzq4fjxkjy0i29b3ingfi4-koboredux-0.7.5.1.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/r0nn34a7248cma7az5b8l9da8vpk8831-koboredux-0.7.5.1