[Nix-dev] Problem with the SSL CA cert

[stewart mackenzie]

We can manually curl for the files, we can manually run cargo, but as
soon as you run it through nix it fails.

--- snip ---

Fetching /tmp/nix-build-development_test-fetch.drv-0/fvm to
/nix/store/b73ag3bvlrcchz791r1ijfilbyyigv3d-development_test-fetch
Fetching /tmp/nix-build-capnpc-rust-2015-12-07-fetch.drv-0/capnpc-rust-1123a4f5de32f0300f1a6b8014b6c3525e170fa9-src
to /nix/store/0p4fy98wnwdxv1phizj2wrx649c8yxgd-capnpc-rust-2015-12-07-fetch
Using rust registry from
/nix/store/z3wfziqiyi2sr4pq5rpvbzdpg9z9vzpr-rustRegistry-2016-02-28-c1f041c
Using rust registry from
/nix/store/z3wfziqiyi2sr4pq5rpvbzdpg9z9vzpr-rustRegistry-2016-02-28-c1f041c
    Updating registry
`file:///nix/store/z3wfziqiyi2sr4pq5rpvbzdpg9z9vzpr-rustRegistry-2016-02-28-c1f041c`
    Updating registry
`file:///nix/store/z3wfziqiyi2sr4pq5rpvbzdpg9z9vzpr-rustRegistry-2016-02-28-c1f041c`
 Downloading libloading v0.2.1 (registry
file:///nix/store/z3wfziqiyi2sr4pq5rpvbzdpg9z9vzpr-rustRegistry-2016-02-28-c1f041c)
 Downloading byteorder v0.4.2 (registry
file:///nix/store/z3wfziqiyi2sr4pq5rpvbzdpg9z9vzpr-rustRegistry-2016-02-28-c1f041c)
unable to get packages from source

Caused by:
  failed to download package `byteorder v0.4.2 (registry
file:///nix/store/z3wfziqiyi2sr4pq5rpvbzdpg9z9vzpr-rustRegistry-2016-02-28-c1f041c)`
from https://crates.io/api/v1/crates/byteorder/0.4.2/download

Caused by:
  Problem with the SSL CA cert (path? access rights?)
unable to get packages from source

--- snip ---

cacert is in configuration.nix

What gives?