less can't read lesskey on nixos unstable

[frdiener]

Observed behaviour:
Less complains about missing lesskey-src.

Expected behaviour:
No errors on calling less.

Steps to reproduce:
Run clx with nix unstable and launch less from it.

Description:
When running clx and launching less via or , less complains about a missing lesskey-file:
There is no lesskey-src=/path/to/lesskey option ("less --help" for help) Press RETURN to continue
The lesskey is actually created at the given path, but somehow it cannot be read.

$ clx --version
clx version 3.7

$ less --version
less 668 (PCRE2 regular expressions)
Copyright (C) 1984-2024  Mark Nudelman