datadog service fails to build

datadog service failed to build with error message:

```
[Error] Some services failed to build:
[Error] Service: datadog
[Error] Error: The command '/bin/sh -c export PATH=$PATH:$GOPATH/bin GODEBUG=netdns=go && cd /usr/app/src/github.com/DataDog/datadog-agent && invoke deps -v' returned a non-zero code: 1
```

