these 2 derivations will be built:
  /nix/store/clmdifwgpfkyih6mlhvm8a12lp870w37-workmux-0.1.248-vendor.drv
  /nix/store/r16x0xs8liz8dzdvp7jciki872jmk5dg-workmux-0.1.248.drv