these 5 derivations will be built:
  /nix/store/6768lmyqcr8bp0w1zi9vfsahjlsh96r6-source.drv
  /nix/store/v8rnyp9xs12dzi80gp2gkf975nz31n3p-omp-18.6.0-cargo-vendor-vendor-staging.drv
  /nix/store/wz1kchi2l170rlnqjzymf77m4268w8pb-omp-18.6.0-cargo-vendor-vendor.drv
  /nix/store/b1vy3ai25sj0mfknh8gcrbv4iigxb4d5-omp-18.6.0.drv
  /nix/store/jq47ishp4m310r0n9yw11qphy9l674fi-check-omp.drv