this derivation will be built:
  /nix/store/am05j2k69nmcypa26p34vajshdabdvwx-cockroach-20.1.8.drv
these 2 paths will be fetched (881.0 KiB download, 2.5 MiB unpacked):
  /nix/store/sx99pxm4j89p42sjzz28ar8nmsb240ks-govers-unstable-2016-06-23
  /nix/store/ca0mjv45h557xzgri05rjz0kcv4pczif-remove-references-to