tests.nixpkgs-check-by-name: Improve lib path handling in tests

nix-build failed because the tests assume to run in a CWD equal to the
project root, which is not the case in the derivation build.

This commit fixes it by not using hacky `..` references to paths,
and instead uses NIX_PATH for all implicit Nix testing path
dependencies.

Also the root of the `lib` path gets passed in from the `default.nix`
file, so all the relative path handling is done by Nix during evaluation
already, and in the Nix store when possible.

0 files changed, 0 insertions, 0 deletions