Question: how to run apps

[beckend]

admin💻laptop-main 🗂️ /etc/nixos on main ✓
> nix flake show
warning: Git tree '/etc/nixos' is dirty
git+file:///etc/nixos
├───apps
│   ├───aarch64-darwin
│   │   └───"vms.test.run": app: test
│   ├───aarch64-linux
│   │   └───"vms.test.run": app: test
│   ├───armv6l-linux
│   │   └───"vms.test.run": app: test
│   ├───armv7l-linux
│   │   └───"vms.test.run": app: test
│   ├───i686-linux
│   │   └───"vms.test.run": app: test
│   ├───powerpc64le-linux
│   │   └───"vms.test.run": app: test
│   ├───riscv64-linux
│   │   └───"vms.test.run": app: test
│   ├───x86_64-darwin
│   │   └───"vms.test.run": app: test
│   ├───x86_64-freebsd
│   │   └───"vms.test.run": app: test
│   └───x86_64-linux
│       └───"vms.test.run": app: test

flake_part_vm_test.nix

{ }:

{
  perSystem =
    { pkgs, ... }:
    {
      apps = {
        "vms.test.run" = {
          program = "${pkgs.coreutils}/bin/ls";
          type = "app";

          meta = {
            description = "test";
          };
        };
      };
    };

> nix run .#vms.test.run
warning: Git tree '/etc/nixos' is dirty
error: flake 'git+file:///etc/nixos' does not provide attribute 'apps.x86_64-linux.vms.test.run', 'packages.x86_64-linux.vms.test.run', 'legacyPackages.x86_64-linux.vms.test.run' or 'vms.test.run'
       Did you mean one of ams, dms, lms, nms or pms?

> nix run .#apps.x86_64-linux.vms.test.run
warning: Git tree '/etc/nixos' is dirty
error: flake 'git+file:///etc/nixos' does not provide attribute 'apps.x86_64-linux.apps.x86_64-linux.vms.test.run', 'packages.x86_64-linux.apps.x86_64-linux.vms.test.run', 'legacyPackages.x86_64-linux.apps.x86_64-linux.vms.test.run' or 'apps.x86_64-linux.vms.test.run'
       Did you mean one of a2ps, alps, apbs, aapt or acpi?

[roberth]

Attribute names can be accessed in the CLI the same way you would in the language, but with the added complication that you have to quote your argument again for the shell:

nix run '.#"vms.test.run"'

: or / may be more attractive separators if you have the choice.