this derivation will be built:
  /nix/store/jaq3ja13j7pi3bgvak8halc7566qk4wm-iets-linttest.drv
building '/nix/store/jaq3ja13j7pi3bgvak8halc7566qk4wm-iets-linttest.drv'
iets-linttest> ok   absolute-path-in-drv
iets-linttest> ok   absolute-path-literal
iets-linttest> ok   dir-copy-unfiltered