these 3 derivations will be built:
  /nix/store/c79v10yzihjdrm0sc0m00nx971ivca54-ctx-1.2.1-vendor-staging.drv
  /nix/store/jbp8dnvv3wy0jlfdn85zibiq6kpg729q-ctx-1.2.1-vendor.drv
  /nix/store/8saljhw5d8dw6xd0swlibl1p9ayjaws2-ctx-1.2.1.drv