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nix-env:tldr:08686
The command "nix-env -i ${pkg_name} --file ${example-com}" is used to install a package named "${pkg_name}" from a Nix expression file named "${example-com}".
Here is a breakdown of each part of the command:
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"nix-env" is the Nix package manager's command-line tool for managing Nix packages on your system.
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"-i" is a flag/option used with "nix-env" to specify that we want to install a package.
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"${pkg_name}" is a placeholder for the name of the package that you want to install. You would replace "${pkg_name}" with the actual name of the package you want to install.
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"--file" is another flag/option used with "nix-env" to specify that we want to install the package from a Nix expression file, rather than using the default Nix channels.
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"${example-com}" is a placeholder for the name of the Nix expression file that contains the package definition. You would replace "${example-com}" with the actual name of the Nix expression file.
In summary, this command installs a package from a specific Nix expression file onto your system using the Nix package manager.