Cannot follow Nix tutorial
When you try to run the nix.dev
tutorial, you may find that the
nix-shell -p cowsay lolcat command
doesn't work as expected. There are a few potential
reasons for why this happens:
Nix is unable to find
nixpkgs. Fix this by
installing a channel:
nix-channel --add https://nixos.org/channels/nixpkgs-unstable
nix-channel --updateThe shell cannot find cowsay or
lolcat. This may be because you have a
.bashrc or .bash_profile
script which modifies the PATH in some
way that prevents nix from modifying it
as expected. You also might have a line that
launches another shell, like exec fish
which causes this problem.