this derivation will be built:
  /nix/store/nlavzkwxa0c25dfsw9ld2nvrkxywv80n-yeetgif-1.23.6.drv
this path will be fetched (857.6 KiB download, 2.4 MiB unpacked):
  /nix/store/c0nirlzbim4s1sq4ykg8z24x8fcqa3c8-govers-unstable-2016-06-23