these 3 derivations will be built:
  /nix/store/b91brhxkrdxkgg2gw87wssrax618f9ns-restrict-message.drv
  /nix/store/4vqd3lpa1kx8y44gx6iz50s1fj6dbkgv-koboredux-0.7.5.1-Linux.tar.bz2.drv
  /nix/store/i7wwa2n4rn59bhz6h9xk35x2inwksbk1-koboredux-0.7.5.1.drv
this path will be fetched (0.0 KiB download, 420.7 KiB unpacked):
  /nix/store/4m8mq595650dczjm4jw63frd9rni5n1f-audiality2-1.9.4
building '/nix/store/b91brhxkrdxkgg2gw87wssrax618f9ns-restrict-message.drv'
building '/nix/store/4a659smp9xr3kc6fqnifzkasq5cyfr15-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://$PWD/koboredux-0.7.5.1-Linux.tar.bz2
koboredux-0.7.5.1-Linux.tar.bz2> 
koboredux-0.7.5.1-Linux.tar.bz2> Alternatively, install the "koboredux-free" package, which replaces the
koboredux-0.7.5.1-Linux.tar.bz2> proprietary assets with a placeholder theme.
koboredux-0.7.5.1-Linux.tar.bz2> 
koboredux-0.7.5.1-Linux.tar.bz2> ***
koboredux-0.7.5.1-Linux.tar.bz2> 
error: Cannot build '/nix/store/4a659smp9xr3kc6fqnifzkasq5cyfr15-koboredux-0.7.5.1-Linux.tar.bz2.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/80xh7zyw9iq6y7wssgnvqklnki5y6jqn-koboredux-0.7.5.1-Linux.tar.bz2
       Last 15 log lines:
       >
       > ***
       > Please purchase the game on https://olofson.itch.io/kobo-redux
       > and download the Linux build.
       >
       > Once you have downloaded the file, please use the following command
       > and re-run the installation:
       >
       > nix-prefetch-url file://$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/4a659smp9xr3kc6fqnifzkasq5cyfr15-koboredux-0.7.5.1-Linux.tar.bz2.drv
error: build of resolved derivation '/nix/store/4a659smp9xr3kc6fqnifzkasq5cyfr15-koboredux-0.7.5.1-Linux.tar.bz2.drv' failed
error: Cannot build '/nix/store/i7wwa2n4rn59bhz6h9xk35x2inwksbk1-koboredux-0.7.5.1.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/q0jx87r5wpnsjazjkdk0rifp7m5d4h7f-koboredux-0.7.5.1