meson build system: ERROR: Program 'coreutils' not found or not executable

[trofi]

Describe the bug

On non-NixOS distributuions coreutils binary is not always present (Gentoo is an example).

Steps To Reproduce

As a result meson setup fails as:

$ meson setup ..
...
Executing subproject nix-functional-tests

...
nix-functional-tests| Program coreutils found: NO

../src/nix-functional-tests/meson.build:24:14: ERROR: Program 'coreutils' not found or not executable

As an example lix fixes it as https://git.lix.systems/lix-project/lix/commit/fb1b21103733a2800aede0ffead2f0e91573c0c8

Initial lix issue with some extra context: https://git.lix.systems/lix-project/lix/issues/376

Steps To Reproduce

Expected behavior

Metadata

Additional context

Checklist

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

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[trofi]

Attempting the trivial fix:

• tests/functional/meson.build: always look up ls as a coreutils proxy #11976