I tried to create a package for uwsgi (in git guix) by $ guix import pypi uwsgi
...From https://pypi.python.org/packages/source/u/uWSGI/uwsgi-2.0.12.tar.gz... ... (package (name "python-uwsgi") (version "2.0.12") (source (origin (method url-fetch) (uri (pypi-uri "uWSGI" version)) (sha256 (base32 "02g46dnw5j1iw8fsq392bxbk8d21b9pdgb3ypcinv3b4jzdm2srh")))) (build-system python-build-system) (inputs `(("python-setuptools" ,python-setuptools))) (home-page "UNKNOWN") (synopsis "The uWSGI server") (description "The uWSGI server") (license #f)) Then I put that (and define-public python-uwsgi ...) into python.scm and did $ guix package -i python-uwsgi I get the following error message: Starting download of /gnu/store/d16s3cw2arg89pm7djh6xrdkf0dnckyy-uWSGI-2.0.12.tar.gz From https://pypi.python.org/packages/source/u/uWSGI/uWSGI-2.0.12.tar.gz... ERROR: download failed "https://pypi.python.org/packages/source/u/uWSGI/uWSGI-2.0.12.tar.gz" 404 "Not Found" failed to download "/gnu/store/d16s3cw2arg89pm7djh6xrdkf0dnckyy-uWSGI-2.0.12.tar.gz" from "https://pypi.python.org/packages/source/u/uWSGI/uWSGI-2.0.12.tar.gz" builder for `/gnu/store/d5jfk4l2yvxfd3pw0fndwx2bxjwg1gpl-uWSGI-2.0.12.tar.gz.drv' failed to produce output path `/gnu/store/d16s3cw2arg89pm7djh6xrdkf0dnckyy-uWSGI-2.0.12.tar.gz' cannot build derivation `/gnu/store/xqwnqx8yw63i864z0c3vd3vr9c8xcflr-python-uwsgi-2.0.12.drv': 1 dependencies couldn't be built guix package: error: build failed: build of `/gnu/store/xqwnqx8yw63i864z0c3vd3vr9c8xcflr-python-uwsgi-2.0.12.drv' failed (Note the wrong basename) guix/build-system/python.scm says: (define* (pypi-uri name version #:optional (extension ".tar.gz")) "Return a URI string for the Python package hosted on the Python Package Index (PyPI) corresponding to NAME and VERSION. EXTENSION is the file name extension, such as '.tar.gz'." (string-append "https://pypi.python.org/packages/source/" (string-take name 1) "/" name "/" name "-" version extension)) So it's currently impossible for pypi-uri to work correctly in the uwsgi case.