PySide2 not found when installing from PyPI

[Matt]

I'm trying to package a Python application I'm writing.  It runs on Guix from 
source with the python-pyside-2 package installed and runs on Debian using a 
Python venv.  I've uploaded the application to PyPI.  Doing a guix import pypi, 
I get this Guix definition:

(use-modules
 (guix packages)
 (guix download)
 (gnu packages python)
 (gnu packages qt)
 (guix build-system python)
 ((guix licenses) #:prefix license:))


(define-public python-t-rex-typer
(package
  (name "python-t-rex-typer")
  (version "0.1.5")
  (source
   (origin
     (method url-fetch)
     (uri (pypi-uri "t_rex_typer" version))
     (sha256
      (base32 "0y08zacchwkx95dla1lbrqkxfnsknhm8ymr6ad08vijbwf5xircp"))))
  (build-system python-build-system)
  (propagated-inputs (list python-pyside-2))
  (home-page "https://github.com/excalamus/t_rex_typer";)
  (synopsis "Steno practice")
  (description "Steno practice")
  (license license:gpl3+)))

python-t-rex-typer

When I run guix package on this, it fails saying that the PySide2 dependency 
doesn't exist:

starting phase `set-SOURCE-DATE-EPOCH'
phase `set-SOURCE-DATE-EPOCH' succeeded after 0.0 seconds
starting phase `set-paths'
environment variable `PATH' set to 
`/gnu/store/j3cx0yaqdpw0mxizp5bayx93pya44dhn-python-wrapper-3.9.9/bin:/gnu/store/g2ajyl8xk9aarxrgjbng2hkj3qm2v0z2-tar-1.34/bin:/gnu/store/iixwcv3k49ks1rf34pjgfzmzyhhgwng3-gzip-1.10/bin:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/bin:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/bin:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin:/gnu/store/ahmmvw21p11ik80lg1f953y7fd8bqkjm-diffutils-3.8/bin:/gnu/store/z39hnrwds1dgcbpfgj8dnv2cngjb2xbl-patch-2.7.6/bin:/gnu/store/39rsx3nl4c31952jybbjb8d6idr5hx7r-findutils-4.8.0/bin:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/bin:/gnu/store/wxgv6i8g0p24q5gcyzd0yr07s8kn9680-sed-4.8/bin:/gnu/store/xjwp2hsd9256icjjybfrmznppjicywf6-grep-3.6/bin:/gnu/store/d251rfgc9nm2clzffzhgiipdvfvzkvwi-coreutils-8.32/bin:/gnu/store/55cbpsi18mahg131nmiya6km5b4mscfa-make-4.3/bin:/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin:/gnu/store/s2pg5k98fl2g2szg9dykxyd9zl3xihv9-ld-wrapper-0/bin:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/bin:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/bin:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/bin:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/sbin:/gnu/store/b6j1qw1a5rkbfvcy7lc9fm95abbzpa4x-python-3.9.9/bin:/gnu/store/i20kq00ymvnsjzawbrxy4qd3ps24zw0w-python-shiboken-2-5.15.2/bin'
environment variable `GUIX_PYTHONPATH' set to 
`/gnu/store/562nb8gbfi0ba2li9wmj6ws38fk7swmy-python-pyside-2-5.15.2/lib/python3.9/site-packages:/gnu/store/b6j1qw1a5rkbfvcy7lc9fm95abbzpa4x-python-3.9.9/lib/python3.9/site-packages:/gnu/store/i20kq00ymvnsjzawbrxy4qd3ps24zw0w-python-shiboken-2-5.15.2/lib/python3.9/site-packages'
environment variable `PYTHONTZPATH' unset
environment variable `BASH_LOADABLES_PATH' unset
environment variable `C_INCLUDE_PATH' set to 
`/gnu/store/562nb8gbfi0ba2li9wmj6ws38fk7swmy-python-pyside-2-5.15.2/include:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/include:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/include:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/include:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/include:/gnu/store/55cbpsi18mahg131nmiya6km5b4mscfa-make-4.3/include:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/include:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/include:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/include:/gnu/store/b6j1qw1a5rkbfvcy7lc9fm95abbzpa4x-python-3.9.9/include:/gnu/store/i20kq00ymvnsjzawbrxy4qd3ps24zw0w-python-shiboken-2-5.15.2/include:/gnu/store/6mjww4iz4xdan74d5bbjfh7il8rngfkk-linux-libre-headers-5.10.35/include'
environment variable `CPLUS_INCLUDE_PATH' set to 
`/gnu/store/562nb8gbfi0ba2li9wmj6ws38fk7swmy-python-pyside-2-5.15.2/include:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/include:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/include:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/include:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/include:/gnu/store/55cbpsi18mahg131nmiya6km5b4mscfa-make-4.3/include:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/include:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/include/c++:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/include:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/include:/gnu/store/b6j1qw1a5rkbfvcy7lc9fm95abbzpa4x-python-3.9.9/include:/gnu/store/i20kq00ymvnsjzawbrxy4qd3ps24zw0w-python-shiboken-2-5.15.2/include:/gnu/store/6mjww4iz4xdan74d5bbjfh7il8rngfkk-linux-libre-headers-5.10.35/include'
environment variable `LIBRARY_PATH' set to 
`/gnu/store/562nb8gbfi0ba2li9wmj6ws38fk7swmy-python-pyside-2-5.15.2/lib:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/lib:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/lib:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/lib:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/lib:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/lib:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/lib:/gnu/store/4jdghmc65q7i7ib89zmvq66l0ghf7jc4-glibc-2.33-static/lib:/gnu/store/fnr1z6xsan0437r0yg48d0y8k32kqxby-glibc-utf8-locales-2.33/lib:/gnu/store/b6j1qw1a5rkbfvcy7lc9fm95abbzpa4x-python-3.9.9/lib:/gnu/store/i20kq00ymvnsjzawbrxy4qd3ps24zw0w-python-shiboken-2-5.15.2/lib'
environment variable `GUIX_LOCPATH' set to 
`/gnu/store/fnr1z6xsan0437r0yg48d0y8k32kqxby-glibc-utf8-locales-2.33/lib/locale'
phase `set-paths' succeeded after 0.0 seconds
starting phase `install-locale'
using 'en_US.utf8' locale for category "LC_ALL"
phase `install-locale' succeeded after 0.0 seconds
starting phase `unpack'
t_rex_typer-0.1.5/
t_rex_typer-0.1.5/PKG-INFO
t_rex_typer-0.1.5/README.md
t_rex_typer-0.1.5/setup.cfg
t_rex_typer-0.1.5/setup.py
t_rex_typer-0.1.5/t_rex_typer/
t_rex_typer-0.1.5/t_rex_typer/__init__.py
t_rex_typer-0.1.5/t_rex_typer/__main__.py
t_rex_typer-0.1.5/t_rex_typer/resources/
t_rex_typer-0.1.5/t_rex_typer/resources/keyboard_48.png
t_rex_typer-0.1.5/t_rex_typer/resources/trex_48.png
t_rex_typer-0.1.5/t_rex_typer/resources/trex_96.png
t_rex_typer-0.1.5/t_rex_typer/resources/trex_w_board_48.png
t_rex_typer-0.1.5/t_rex_typer/resources/trex_w_board_96.png
t_rex_typer-0.1.5/t_rex_typer/t_rex_typer.py
t_rex_typer-0.1.5/t_rex_typer/translation_dict.py
t_rex_typer-0.1.5/t_rex_typer/widgets.py
t_rex_typer-0.1.5/t_rex_typer.egg-info/
t_rex_typer-0.1.5/t_rex_typer.egg-info/PKG-INFO
t_rex_typer-0.1.5/t_rex_typer.egg-info/SOURCES.txt
t_rex_typer-0.1.5/t_rex_typer.egg-info/dependency_links.txt
t_rex_typer-0.1.5/t_rex_typer.egg-info/entry_points.txt
t_rex_typer-0.1.5/t_rex_typer.egg-info/requires.txt
t_rex_typer-0.1.5/t_rex_typer.egg-info/top_level.txt
phase `unpack' succeeded after 0.0 seconds
starting phase `ensure-no-mtimes-pre-1980'
phase `ensure-no-mtimes-pre-1980' succeeded after 0.0 seconds
starting phase `enable-bytecode-determinism'
phase `enable-bytecode-determinism' succeeded after 0.0 seconds
starting phase `ensure-no-cythonized-files'
phase `ensure-no-cythonized-files' succeeded after 0.0 seconds
starting phase `patch-usr-bin-file'
phase `patch-usr-bin-file' succeeded after 0.0 seconds
starting phase `patch-source-shebangs'
phase `patch-source-shebangs' succeeded after 0.0 seconds
starting phase `patch-generated-file-shebangs'
phase `patch-generated-file-shebangs' succeeded after 0.0 seconds
starting phase `build'
running "python setup.py" with command "build" and parameters ()
running build
running build_py
file t_rex_typer.py (for module t_rex_typer) not found
creating build
creating build/lib
creating build/lib/t_rex_typer
copying t_rex_typer/translation_dict.py -> build/lib/t_rex_typer
copying t_rex_typer/__main__.py -> build/lib/t_rex_typer
copying t_rex_typer/widgets.py -> build/lib/t_rex_typer
copying t_rex_typer/__init__.py -> build/lib/t_rex_typer
copying t_rex_typer/t_rex_typer.py -> build/lib/t_rex_typer
creating build/lib/t_rex_typer/resources
copying t_rex_typer/resources/trex_96.png -> build/lib/t_rex_typer/resources
copying t_rex_typer/resources/keyboard_48.png -> build/lib/t_rex_typer/resources
copying t_rex_typer/resources/trex_w_board_48.png -> 
build/lib/t_rex_typer/resources
copying t_rex_typer/resources/trex_w_board_96.png -> 
build/lib/t_rex_typer/resources
copying t_rex_typer/resources/trex_48.png -> build/lib/t_rex_typer/resources
file t_rex_typer.py (for module t_rex_typer) not found
warning: build_py: byte-compiling is disabled, skipping.

phase `build' succeeded after 0.2 seconds
starting phase `install'
running "python setup.py" with command "install" and parameters 
("--prefix=/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5"
 "--no-compile" "--single-version-externally-managed" "--root=/")
running install
running build
running build_py
file t_rex_typer.py (for module t_rex_typer) not found
file t_rex_typer.py (for module t_rex_typer) not found
warning: build_py: byte-compiling is disabled, skipping.

running install_lib
creating /gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5
creating 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib
creating 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9
creating 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages
creating 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer
copying build/lib/t_rex_typer/translation_dict.py -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer
copying build/lib/t_rex_typer/__main__.py -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer
creating 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/resources
copying build/lib/t_rex_typer/resources/trex_96.png -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/resources
copying build/lib/t_rex_typer/resources/keyboard_48.png -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/resources
copying build/lib/t_rex_typer/resources/trex_w_board_48.png -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/resources
copying build/lib/t_rex_typer/resources/trex_w_board_96.png -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/resources
copying build/lib/t_rex_typer/resources/trex_48.png -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/resources
copying build/lib/t_rex_typer/widgets.py -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer
copying build/lib/t_rex_typer/__init__.py -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer
copying build/lib/t_rex_typer/t_rex_typer.py -> 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer
warning: install_lib: byte-compiling is disabled, skipping.

running install_egg_info
running egg_info
writing t_rex_typer.egg-info/PKG-INFO
writing dependency_links to t_rex_typer.egg-info/dependency_links.txt
writing entry points to t_rex_typer.egg-info/entry_points.txt
writing requirements to t_rex_typer.egg-info/requires.txt
writing top-level names to t_rex_typer.egg-info/top_level.txt
file t_rex_typer.py (for module t_rex_typer) not found
reading manifest file 't_rex_typer.egg-info/SOURCES.txt'
writing manifest file 't_rex_typer.egg-info/SOURCES.txt'
Copying t_rex_typer.egg-info to 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer-0.1.5-py3.9.egg-info
running install_scripts
Installing t_rex_typer script to 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/bin
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5'...
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/bin'...
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib'...
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9'...
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages'...
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer'...
Compiling 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/__init__.py'...
Compiling 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/__main__.py'...
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/resources'...
Compiling 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/t_rex_typer.py'...
Compiling 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/translation_dict.py'...
Compiling 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer/widgets.py'...
Listing 
'/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/lib/python3.9/site-packages/t_rex_typer-0.1.5-py3.9.egg-info'...
phase `install' succeeded after 0.3 seconds
starting phase `add-install-to-pythonpath'
phase `add-install-to-pythonpath' succeeded after 0.0 seconds
starting phase `add-install-to-path'
phase `add-install-to-path' succeeded after 0.0 seconds
starting phase `wrap'
find-files: 
/gnu/store/xisd70jp26grrizq83jjdarwvnypb512-python-t-rex-typer-0.1.5/sbin: No 
such file or directory
phase `wrap' succeeded after 0.0 seconds
starting phase `check'
running "python setup.py" with command "test" and parameters ()
running test
WARNING: Testing via this command is deprecated and will be removed in a future 
version. Users looking for a generic test entry point independent of test 
runner are encouraged to use tox.
WARNING: The wheel package is not available.
WARNING: The directory '/homeless-shelter/.cache/pip' or its parent directory 
is not owned or is not writable by the current user. The cache has been 
disabled. Check the permissions and owner of that directory. If executing pip 
with sudo, you should use sudo's -H flag.
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, 
status=None)) after connection broken by 
'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 
0x7ffff5a731c0>: Failed to establish a new connection: [Errno -2] Name or 
service not known')': /simple/pyside2/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, 
status=None)) after connection broken by 
'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 
0x7ffff5a5e610>: Failed to establish a new connection: [Errno -2] Name or 
service not known')': /simple/pyside2/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, 
status=None)) after connection broken by 
'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 
0x7ffff5a5e460>: Failed to establish a new connection: [Errno -2] Name or 
service not known')': /simple/pyside2/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, 
status=None)) after connection broken by 
'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 
0x7ffff5a5e250>: Failed to establish a new connection: [Errno -2] Name or 
service not known')': /simple/pyside2/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, 
status=None)) after connection broken by 
'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 
0x7ffff5acdee0>: Failed to establish a new connection: [Errno -2] Name or 
service not known')': /simple/pyside2/
ERROR: Could not find a version that satisfies the requirement PySide2>=5.15 
(from versions: none)
ERROR: No matching distribution found for PySide2>=5.15
error: Command 
'['/gnu/store/j3cx0yaqdpw0mxizp5bayx93pya44dhn-python-wrapper-3.9.9/bin/python',
 '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', 
'/tmp/guix-build-python-t-rex-typer-0.1.5.drv-0/tmpao_zm7ts', '--quiet', 
'PySide2>=5.15']' returned non-zero exit status 1.
error: in phase 'check': uncaught exception:
%exception #<&invoke-error program: "python" arguments: ("-c" "import 
setuptools, tokenize;__file__='setup.py';f=getattr(tokenize, 'open', 
open)(__file__);code=f.read().replace('\\r\\n', 
'\\n');f.close();exec(compile(code, __file__, 'exec'))" "test") exit-status: 1 
term-signal: #f stop-signal: #f> 
phase `check' failed after 8.1 seconds
command "python" "-c" "import setuptools, 
tokenize;__file__='setup.py';f=getattr(tokenize, 'open', 
open)(__file__);code=f.read().replace('\\r\\n', 
'\\n');f.close();exec(compile(code, __file__, 'exec'))" "test" failed with 
status 1

Looking at PyPI, wheels definitely exist.  I'm also able to install and run it 
no problem from PyPI on Debian.  When I try installing from PyPI on Guix 
through a venv, the package installs (but fails on ImportError: 
libgthread-2.0.so.0: cannot open shared object file: No such file or directory. 
 That's beside the point, though, PySide2 installs.).

I'm also confused because it says

file t_rex_typer.py (for module t_rex_typer) not found

The file is definitely in there and, as I said, it runs on Debian, so must be 
packaged correctly in terms of the Python imports etc.

Any idea on the source of the errors and how I might go about fixing them?