Comma runs software without installing it.
Basically it just wraps together nix shell -c and nix-index. You stick a , in front of a command to
run it from whatever location it happens to occupy in nixpkgs without really thinking about it.
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Nix with Flakes:
$ nix profile install github:nix-community/comma
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No flakes:
$ nix-env -i -f "https://github.com/nix-community/comma/archive/master.tar.gz"
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No flakes:
replace "v1.2.0" with the latest version
environment.systemPackages = let comma = (import (pkgs.fetchFromGitHub { owner = "nix-community"; repo = "comma"; rev = "v1.2.0"; sha256 = "0000000000000000000000000000000000000000000000000000"; })).default; in [ comma ];
, cowsay neato