Error I got everytime i ran it even through different methods

[Felopater-Melika]

/nix/store/40xcrs3ff32jzzzsmf28i92h8l8c12ax-nixGL/bin/nixGL: line 6: exec: program: not found

i got this exact error from using the channel method and running it directly from a flake

[nasrally]

exec: program:

Means you're trying to run a program called program, since it is a generic name there's likely no such program on your system. You should use existing programs that bash can find in paths specified in your PATH environment variable or if you're trying to run some other executable use either an absolute or a relative path, if it is in your working directory prepend it with ./