these 4 derivations will be built:
  /nix/store/6ixl70xnkmhqpmq05jw6bp9m6grbmjsi-pi.drv
  /nix/store/20qm8cbzn1dw0h33dxhclifg4bskfdid-home-manager-path.drv
  /nix/store/hkldmh7vawq9p77sgn8q6i48lmknzidc-activation-script.drv
  /nix/store/3q30dm2icc7rkwk5yr14clig6q2ma008-home-manager-generation.drv