Previously unstable versions would not have been found, because the
regular expression was looking for a numeric version after the attribute
name. When the version is however an unstable one, it would start with
> unstable-2021-04-23
and therefore not match the pattern.
There is just one test failure on darwin, and it can probably be worked
around by allowing local networking.
This should hopefully fix the following testsuite error:
```
___________________________ test_timeout_subsequent ____________________________
tests/test_other.py:137: in test_timeout_subsequent
assert response.status == 200
E assert 408 == 200
E +408
E -200
Handler = <class 'tests.test_other.test_timeout_subsequent.<locals>.Handler'>
_ = b'Request Timeout'
http = <httplib2.Http object at 0x10860f400>
response = {'content-type': 'text/plain', 'status': '408', 'content-length': 15}
uri = 'http://localhost:58287/'
----------------------------- Captured stderr call -----------------------------
Traceback (most recent call last):
File "/private/tmp/nix-build-python3.8-httplib2-0.19.1.drv-0/source/tests/__init__.py", line 311, in server_socket_thread
fun(client, tick)
File "/private/tmp/nix-build-python3.8-httplib2-0.19.1.drv-0/source/tests/__init__.py", line 392, in server_request_socket_handler
request = HttpRequest.from_buffered(buf)
File "/private/tmp/nix-build-python3.8-httplib2-0.19.1.drv-0/source/tests/__init__.py", line 177, in from_buffered
return parse_http_message(cls, buf)
File "/private/tmp/nix-build-python3.8-httplib2-0.19.1.drv-0/source/tests/__init__.py", line 120, in parse_http_message
start_line = buf.readline()
File "/private/tmp/nix-build-python3.8-httplib2-0.19.1.drv-0/source/tests/__init__.py", line 110, in readline
self._fill(more=1)
File "/private/tmp/nix-build-python3.8-httplib2-0.19.1.drv-0/source/tests/__init__.py", line 81, in _fill
chunk = self._sock.recv(8 << 10)
ConnectionResetError: [Errno 54] Connection reset by peer
```
wstunnel is packaged twice in nixpkgs, once standalone and once in
haskellPackages. The standalone version is outdated while the version in
haskellPackages is updated automatically from Hackage, so we are
removing the standalone Nix expression but still keep the static
executable.
