I requesting for help with writing defenition for python retro game
engine[1].

There are steps according to manual to build this engine[2]:

1. Get sources with `git clone https://github.com/kitao/pyxel'
2. "cd" to this dir
3. Invoke `guix environment --pure --ad-hoc gcc make python python-pip
      coreutils findutils sdl2 sdl2-image'
4. Appnend this to in file pyxel/core/Makefile on line 50
   `-I/gnu/store/flvzd76nb8xzbp1sf5ckkvpwhspz9fqx-sdl-union-1.2.15/include/SDL2'
5. Invoke `make -C pyxel/core clean all'
6. Invoke `pip3 install .' to install this package

And I got fully functional (according to examples) package in my system,
but when I was tried to write defenition:
┌────
│ (define-public python-pyxel
│   (package
│    (name "python-pyxel")
│    (version "1.4.3")
│    (source
│     (origin
│      (method url-fetch)
│      (uri "file:///home/lil/src/ring/pyxel" ;; this is version with modified Makefile
│ 	  ;; (pypi-uri "pyxel" version) <- this is original content from $ guix import pypi pyxel
│ 	  )
│      (sha256
│       (base32
│        "1gxvagmj37gs871bh77xafm5jyiaw1hvs76wb97w96kf3g8abhkz"))))
│    (build-system python-build-system)
│    (inputs
│     `(("gifsicle" ,gifsicle)
│       ("sdl2" ,(sdl-union (list sdl2 sdl2-image)))))
│    (home-page "https://github.com/kitao/pyxel")
│    (synopsis "A retro game engine for Python")
│    (description "A retro game engine for Python")
│    (license license:expat)))
└────

I was stacked with that error[3]
┌────
│ starting phase `build'
│ running "python setup.py" with command "build" and parameters ()
│ Traceback (most recent call last):
│   File "<string>", line 1, in <module>
│   File "setup.py", line 2, in <module>
│     from pyxel import VERSION
│   File "/tmp/guix-build-python-pyxel-1.4.3.drv-0/source/pyxel/__init__.py", line 10, in <module>
│     from . import core  # type: ignore
│   File "/tmp/guix-build-python-pyxel-1.4.3.drv-0/source/pyxel/core/__init__.py", line 42, in <module>
│     _lib = _load_library()
│   File "/tmp/guix-build-python-pyxel-1.4.3.drv-0/source/pyxel/core/__init__.py", line 39, in _load_library
│     return cdll.LoadLibrary(lib_path)
│   File "/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/ctypes/__init__.py", line 451, in LoadLibrary
│     return self._dlltype(name)
│   File "/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/ctypes/__init__.py", line 373, in __init__
│     self._handle = _dlopen(self._name, mode)
│ OSError: libSDL2-2.0.so.0: cannot open shared object file: No such file or directory
│ 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'))" "build" failed with status 1
│ builder for `/gnu/store/2v3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv' failed with exit code 1
│ build of /gnu/store/2v3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv failed
│ View build log at '/var/log/guix/drvs/2v/3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv.bz2'.
│ guix build: error: build of `/gnu/store/2v3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv' failed
└────

As far as I can understand, firstly guix should build C++ dependencies
and /then/ install python package. Isn't it? But I don't know how to do
this.



Footnotes
─────────

[1] <https://github.com/kitao/pyxel> Actually is C++ and Python engine

[2]
<https://github.com/kitao/pyxel#execute-the-following-command-in-any-folder>

[3] For full error see <https://pastebin.com/d18Wrrq4>