these 5 derivations will be built:
  /nix/store/mpx9n6w0pc74b3vpaf20shz8221488im-source.drv
  /nix/store/jmi9l6g8h0qcs7lzsyciirvsnl4vy784-omp-18.7.0-cargo-vendor-vendor-staging.drv
  /nix/store/w1x26y6b5903a656ib8k9nv3dhsr8205-omp-18.7.0-cargo-vendor-vendor.drv
  /nix/store/l7cwgqvq4cf2czxfp4nragrw8sg1f5xf-omp-18.7.0.drv
  /nix/store/px76j63z28p8f4palmia3a7gs7zky0y3-check-omp.drv