Hi,

Pushed with minor commit message adjustments, and add follow up commit
removing pytest-xdist and nose completely.

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bdbf3ab4f0 * master gnu: python-pycurl: Adjust inputs.
e30c169bec * gnu: python-pycurl: Build from git.
851f0662a5 * gnu: python-pycurl: Fix build by running the tests single-threaded.

> ./pre-inst-env guix build python-pycurl --rounds=2
/gnu/store/pv1m7xfmgjb5aqfy94ppl0k3d1h9paxl-python-pycurl-7.45.22
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Thanks,
Oleg