Merge branch 'update-nixpkgs' into 'develop'

Update PaymentServer

See merge request !99

nixos/modules/tests/get-passes.py

@@ -95,7 +95,7 @@ def charge_json(voucher):
     return {
         "token": "tok_abcdef",
         "voucher": voucher,
-        "amount": "100",
+        "amount": "650",
         "currency": "USD",
     }
 

nixpkgs.json

 { "name": "nixpkgs"
-, "url": "https://github.com/PrivateStorageio/nixpkgs/archive/d7c46f46c3e6acfcde44bb05877fd5c9f07dfe1b.tar.gz"
-, "sha256": "1vddxhp3ljaq9qqzbpjp2kx34ps7nzbsn4zy31x0748a52rlsh0q"
+, "url": "https://github.com/PrivateStorageio/nixpkgs/archive/8c7a61c658e32eaccf666e5fe818a996c36a988f.tar.gz"
+, "sha256": "1ln0a8c20qykm57wl901lixny1fcfmzgbavd7pbjk6jbnfij59bl"
 }