these 2 derivations will be built:
  /nix/store/9a4z6mjnmn3qh24z5dyh8jia573xpyg4-workmux-0.1.250-vendor.drv
  /nix/store/rpm81xrcjh6sy2bk4288s8srw5i5gqaj-workmux-0.1.250.drv