[Backport 2.30-maintenance] libexpr: Don't use nix::dirOf in prim_dirOf (fix 2.23 regression)#14522

internal-nix-ci[bot] merged 2 commits into

2.30-maintenanceNixOS/nix:2.30-maintenancefrom

backport-14515-to-2.30-maintenanceNixOS/nix:backport-14515-to-2.30-maintenanceCopy head branch name to clipboard