these 2 derivations will be built:
  /nix/store/z35hxsn1ql44kcsybiba173iz1v5rksx-rootfs-ubuntu-26_04.tar.drv
  /nix/store/bznribyhigqg8x0rlgzqyfp36hv0ip4l-container-test-ubuntu-26-04-environment-variables.drv