these 5 derivations will be built:
  /nix/store/im5cv9xfzj77qw08cxp5ascrfi31w7f8-source.drv
  /nix/store/gzi33qc64ghmbr6kcbbcjgrpcjrzzfb9-but-0.23.1-vendor-staging.drv
  /nix/store/pszc99cprkkfrmfacivqx28mv2a587z6-but-0.23.1-vendor.drv
  /nix/store/7k7mmk36h47z2xgr6y4q0jbszdsx1l0g-but-0.23.1.drv
  /nix/store/3m02rqqrq9nfjm8ilcsf6n0jqg9cr1q5-check-but.drv