this derivation will be built:
  /nix/store/m7p1mhx2hd24lsav7mwl3vr20y33sr4v-spec-nixfmt.drv
warning: m7p1mhx2hd24lsav7mwl3vr20y33sr4v-spec-nixfmt.drv: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}, waiting up to 120s for a worker