correct usage of extraPackages

[matdibu]

I'm trying to add a few extra packages to the environment of a hook, and I've tried using extraPackages, but it only adds them to the nix develop shell, not the hook itself

cspell = {
  enable = true;
  pass_filenames = false;
  extraPackages = [
    pkgs.just
  ];
  entry = "just spell";
};

spell:
    cspell lint --unique --no-progress --no-summary --show-context .

$ nix flake check --print-build-logs 
pre-commit-run> Running: $ pre-commit run --all-files
pre-commit-run> cspell...................................................................Failed
pre-commit-run> - hook id: cspell
pre-commit-run> - exit code: 1
pre-commit-run> Executable `just` not found

it looks like the package is included within the dev shell

devShells.pre-commit = config.pre-commit.devShell;

$ which just
which: no just in (/run/wrappers/bin:/home/mateidibu/.nix-profile/bin:/nix/profile/bin:/home/mateidibu/.local/state/nix/profile/bin:/etc/profiles/per-user/mateidibu/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin)

$ nix develop .#pre-commit

$ which just
/nix/store/ian74ppvb1z7ykc72l7lsxlfpz08b19v-just-1.36.0/bin/just

removing pkgs.just from pre-commit.settings.hooks.cspell.extraPackages removes it the dev shell as well, as expected

[matdibu]

I've tried printing the PATH from within that justfile

spell:
    tr ':' '\n' <<< "$PATH"

with this (ugly) hack

cspell = {
  enable = true;
  pass_filenames = false;
  extraPackages = [
    pkgs.just
    pkgs.nodePackages_latest.cspell
  ];
  entry = "${lib.getExe pkgs.just} spell";
};

but it looks like it includes neither just nor cspell

/nix/store/901c80rlps5q05bnjk1sj4zaz5k736nc-python3-3.12.7/bin
/nix/store/j877rdwz6hk0b4sz4d2blayc35vl4k0d-pre-commit-4.0.1/bin
/nix/store/j3s1h95x9z5jmh1j14ch9q962j0w7al3-python3.12-identify-2.6.1/bin
/nix/store/vjbdfb8y58mmnlv8wxf6hlacfz6zih03-python3.12-pytest-8.3.3/bin
/nix/store/943934n0x0vlg34krjll16ipykjxhdgl-python3.12-nodeenv-1.9.1/bin
/nix/store/jpxpwipk09alblka7sbhqs5vprabn5gv-python3.12-virtualenv-20.26.6/bin
/nix/store/r9gxdanbg938b9vimis7akyawkyb0yax-patchelf-0.15.0/bin
/nix/store/j44p1p9kci9rnrr3aj9a8j8rwvfmg75k-git-2.47.0/bin
/nix/store/sf6y4arqcm100rnnl3dhpg732i774zp6-coreutils-9.5/bin
/nix/store/psjqqbj19n3fqssn38hgz4cv7b7a9alp-findutils-4.10.0/bin
/nix/store/alq4bqllykgwrif112yqgrn9g001kn7b-diffutils-3.10/bin
/nix/store/13wxcn0j2wk911ahfkbvdq241rkprsv8-gnused-4.9/bin
/nix/store/nysgss3ggh3dv7mz08n28h29lazxhyc1-gnugrep-3.11/bin
/nix/store/1cd3p3kjh9c209s7832z8i3b8qcqggca-gawk-5.3.1/bin
/nix/store/cqyjb712c5q3axw9qjij05dnji2a7z48-gnutar-1.35/bin
/nix/store/qfc6wq1wpxvkkjqa6xr5685ip97qc3sr-gzip-1.13/bin
/nix/store/0kxxaix9l5dbih90491mv96zajsac57q-bzip2-1.0.8-bin/bin
/nix/store/iyrpqn6ana7j804dzis338n74kzznmj0-gnumake-4.4.1/bin
/nix/store/mm0pa3z7kk6jh1i9rkxqxjqmd8h1qpxf-bash-5.2p37/bin
/nix/store/3yv1shg4kg4ifkxzg2jgjsrrrd8s1w08-patch-2.7.6/bin
/nix/store/g0ih6cb93dm4n18bah982gsmayah3amy-xz-5.6.3-bin/bin
/nix/store/vkv9a83hknlnr7p2z8mwl16j5pb502gp-file-5.45/bin