Describe the bug

Currently these 2 commands are equivalent:

1. nix run nixpkgs#eza -- arg1 arg2
2. nix run -- nixpkgs#eza arg1 arg2

In the 2nd case - when trying to skip installable (to use the default .#.) and supplying args to the nested command after -- - nix run expects the first argument after the -- to be an "installable". The problem is that it's inconsistent compared to when installable is provided before --.

Steps To Reproduce

1. Run nix run -- arg1 arg2.

Expected behavior

It should run app/package at .#., just like nix run does. Everything else after -- should be passed to the command. But the arg1 is not passed as arg, but an installable.

Metadata

nix-env (Nix) 2.31.1

Additional context

May be resolved / made irrelevant by implementing #6933 (comment), provided that we decide to completely remove -- from nix run - see the comment #6933 (comment).

Checklist

• checked latest Nix manual (source)
• checked open bug issues and pull requests for possible duplicates

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