trying http://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.3.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

trying https://github.com/ruby/ruby/archive/v2_3_3.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   117    0   117    0     0    124      0 --:--:-- --:--:-- --:--:--   124
100 12.2M  100 12.2M    0     0   422k      0  0:00:29  0:00:29 --:--:--  521k
unpacking source archive /private/var/folders/7z/rvts4xk51bzcmydsdw1d0rv80000gn/T/nix-build-source.drv-0/v2_3_3.tar.gz
hash mismatch in fixed-output derivation '/nix/store/1iifly3sa2cgypg6j86hxxga1c24ksqn-source':
  wanted: sha256:0000000000000000000000000000000000000000000000000001
  got:    sha256:0cwjf0nrzaa5g81bw0qp65byyadhxvbnvprkshv3ckjl7yi46zf6
cannot build derivation '/nix/store/5n1dw66w2pm0hfaaj3rja2jprpb6k67k-ruby-2.3.3.drv': 1 dependencies couldn't be built
error: build of '/nix/store/5n1dw66w2pm0hfaaj3rja2jprpb6k67k-ruby-2.3.3.drv', '/nix/store/cb6v7nd9p27h0idfall8msxha1hlzn4d-cakehr-env.drv' failed
direnv: error unmarshal() zlib opening: unexpected EOF
direnv: export +AWS_REGION +RBENV_SHELL +token ~PATH