these 3 derivations will be built:
  /nix/store/qciq5k1v47fhv4876dc3qv3a5c4px08n-devshell-env.bash.drv
  /nix/store/3qm9sydy52pip51lm8r8cs9chfl0yqxg-devshell-dir.drv
  /nix/store/sh0wz9mcfb0ddz10mkgkkkwhhamgsvws-devshell.drv
building '/nix/store/qciq5k1v47fhv4876dc3qv3a5c4px08n-devshell-env.bash.drv'
building '/nix/store/3qm9sydy52pip51lm8r8cs9chfl0yqxg-devshell-dir.drv'
devshell-dir> created 472 symlinks in user environment
building '/nix/store/sh0wz9mcfb0ddz10mkgkkkwhhamgsvws-devshell.drv'