this derivation will be built:
  /nix/store/s3qin51gkxps9z7m7y9kkj7bm307mr94-unit-tests.drv
this path will be fetched (1.5 MiB download, 7.5 MiB unpacked):
  /nix/store/cp747s3fjqi379pgpcrmmxjci7yd0nbb-ShellCheck-0.11.0