Failing with docker pkg download

[0verbyte]

When trying to install the Docker package from GitHub; efdl will fail on different chunks during the download and crash.

% ./bin/efdl https://github.com/boot2docker/osx-installer/releases/download/v1.5.0/Boot2Docker-1.5.0.pkg
Downloading https://github.com/boot2docker/osx-installer/releases/download/v1.5.0/Boot2Docker-1.5.0.pkg
Resolved to https://s3.amazonaws.com/github-cloud/releases/17077232/78eb97be-b13f-11e4-9df5-207a655745c1.pkg?response-content-disposition=attachment%3B%20filename%3DBoot2Docker-1.5.0.pkg&response-content-type=application/octet-stream&AWSAccessKeyId=AKIAISTNZFOVBIJMK3TQ&Expires=1425268318&Signature=tQ%2BO3rHWj0mUs8bxAwd3mIGi9bI%3D
File size 129.8 MB [application/octet-stream]
Saving to /Users/brandon/git/efdl/build/78eb97be-b13f-11e4-9df5-207a655745c1.pkg
[ 15.4% | 20.0 MB / 129.8 MB @ 341.3 KB/s | chunk 20 / 130 | 5m 29s left ]
Chunk 21 failed on range [20971520, 22020095]
HTTP code: 403
Error: Operation not permitted on remote server.
Aborting..
QThread: Destroyed while thread is still running
[1]    887 segmentation fault  ./bin/efdl

[0verbyte]

Still the same when compiling with Qt 5.4.1. If I run with 10 simultaneous connections the download will finish.

% ./bin/efdl -c 10 --show-conn-progress https://github.com/boot2docker/osx-installer/releases/download/v1.5.0/Boot2Docker-1.5.0.pkg
Downloading https://github.com/boot2docker/osx-installer/releases/download/v1.5.0/Boot2Docker-1.5.0.pkg
Resolved to https://s3.amazonaws.com/github-cloud/releases/17077232/78eb97be-b13f-11e4-9df5-207a655745c1.pkg?response-content-disposition=attachment%3B%20filename%3DBoot2Docker-1.5.0.pkg&response-content-type=application/octet-stream&AWSAccessKeyId=AKIAISTNZFOVBIJMK3TQ&Expires=1432266238&Signature=pP1hUueU02EmGqpZgKMh8%2BrtDrY%3D
File size 129.8 MB [application/octet-stream]
Saving to /private/tmp/efdl/build/Boot2Docker-1.5.0.pkg
[ 100.0% | 129.8 MB @ 7.2 MB/s | 13 chunks | 18s total ]
% ./bin/efdl -c 2 --show-conn-progress https://github.com/boot2docker/osx-installer/releases/download/v1.5.0/Boot2Docker-1.5.0.pkg
Downloading https://github.com/boot2docker/osx-installer/releases/download/v1.5.0/Boot2Docker-1.5.0.pkg
Resolved to https://s3.amazonaws.com/github-cloud/releases/17077232/78eb97be-b13f-11e4-9df5-207a655745c1.pkg?response-content-disposition=attachment%3B%20filename%3DBoot2Docker-1.5.0.pkg&response-content-type=application/octet-stream&AWSAccessKeyId=AKIAISTNZFOVBIJMK3TQ&Expires=1432266268&Signature=dmb6qIaNxluWWdpZJira1zujL2g%3D
File size 129.8 MB [application/octet-stream]
Saving to /private/tmp/efdl/build/Boot2Docker-1.5.0.pkg
[ 31.7% | 41.1 MB / 129.8 MB @ 726.4 KB/s | chunk 41 / 130 | 2m 4s left ]
{ chunk #42: 14.5% | 148.8 KB / 1.0 MB @ 148.8 KB/s | 5s left }
{ chunk #43: 0.0% }
Chunk 43 failed on range [44040192, 45088767]
HTTP code: 403
Error: Operation not permitted on remote server.
Aborting..