Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: crossguid 0.2.2-unstable-2019-05-29 -> 0.2.2 https://github.com/graeme-hill/crossguid/releases
attrpath: crossguid
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Failed with exit code 1
this derivation will be built:
  /nix/store/acgvh0p61mfyv10r90bwgswdsz94mp9i-packages.json.drv
error: the build users group 'nixbld' has no members