Docker-compose build fails

[ez2torta]

$ docker build -t saml .
Sending build context to Docker daemon  93.18kB
Step 1/6 : from python:3.6
3.6: Pulling from library/python
ab1fc7e4bf91: Already exists 
35fba333ff52: Already exists 
f0cb1fa13079: Already exists 
3d1dd648b5ad: Already exists 
49f7a0920ce1: Already exists 
4709e515313d: Pull complete 
9f1758f5a166: Pull complete 
bbccfd3ef033: Pull complete 
0752403d51fb: Pull complete 
Digest: sha256:4f309bf7925db6e21f7f1b7db99aa76576007441136f5e22d4fc422491255872
Status: Downloaded newer image for python:3.6
 ---> 5b0503f864f4
Step 2/6 : WORKDIR /src
 ---> Running in b91b6900e1f7
Removing intermediate container b91b6900e1f7
 ---> a81317457729
Step 3/6 : ADD setup.py .
 ---> 769bc36ef581
Step 4/6 : RUN mkdir jumpcloud_aws/
 ---> Running in 0d7e61cf3d9b
Removing intermediate container 0d7e61cf3d9b
 ---> d9a3e89bc057
Step 5/6 : RUN pip install -e . --src /python/libs
 ---> Running in 7b8966236ac7
Obtaining file:///src
Collecting beautifulsoup4==4.5.3 (from jumpcloud-aws==0.1)
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7f56c152b710>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/beautifulsoup4/