these 3 derivations will be built:
  /nix/store/wkjr0sd8mj40k790j57s1ac9wfa21skg-omp-18.20.0-cargo-vendor-vendor.drv
  /nix/store/1dvyp72qb6kakgpw0mg02rdc8snlins7-omp-18.20.0.drv
  /nix/store/y4d39p2pwmjq1s3fxkgyh8cw16ccr9nr-check-omp.drv