Sergei Trofimovich 1c82965b06 endgame-singularity: add "mainProgram" ...

Withtout the change `nix run` fails to run the game:

    $ nix run -f. endgame-singularity
    error: unable to execute '...-endgame-singularity-1.00/bin/endgame-singularity': No such file or directory

2023-10-28 12:25:28 +01:00

..

default.nix

endgame-singularity: add "mainProgram"

2023-10-28 12:25:28 +01:00