Building fails under nix-shell

[bjornfor]

Describe the bug

$ nix-shell
[nix-shell]$ meson setup build .
[...]
perl| Message: Perl install site: /nix/store/nxw1xxfxkd6bm570nb6gv0g6pghp7i4c-perl-5.40.0/lib/perl5/site_perl/5.40.0/x86_64-linux-thread-multi
perl| Message: Assumed Nix-Perl install dir: /usr/local/lib/perl5/site_perl/5.40.0/x86_64-linux-thread-multi

src/perl/meson.build:132:17: ERROR: Command `/nix/store/nxw1xxfxkd6bm570nb6gv0g6pghp7i4c-perl-5.40.0/bin/perl -e 'use DBI; use DBD::SQLite;' -I/usr -I/usr` failed with status 2.

Steps To Reproduce

1. Clone this repository (latest master branch is 327e8ba as of now).
2. Run nix-shell
3. Run meson setup build . to configure and build the project
4. Observe error: src/perl/meson.build:132:17: ERROR: Command /nix/store/nxw1xxfxkd6bm570nb6gv0g6pghp7i4c-perl-5.40.0/bin/perl -e 'use DBI; use DBD::SQLite;' -I/usr -I/usr failed with status 2.

Expected behavior

Building should not fail.

Metadata

NixOS 25.05, Nix 2.28.5, x86_64-linux.

Additional context

#12756 has the same error, but (1) is about aarch64-darwin and (2) was closed several months ago.

Just before failing, meson prints this suspicious path:

Message: Assumed Nix-Perl install dir: /usr/local/lib/perl5/site_perl/5.40.0/x86_64-linux-thread-multi

Checklist

• checked latest Nix manual (source) -- that manual points to https://hydra.nixos.org/build/314141626/download/1/manual/ which is broken; clicking URLs in the index doesn't work, scrolling down the page makes me think CSS isn't loaded properly etc.
• checked open bug issues and pull requests for possible duplicates

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[bjornfor]

I found that running configurePhase in nix-shell does work. But I see no reason for that to be a requirement -- the build system should work out-of-the-box.