Re: Install python pacakge from `.whl` file

[Hamzeh Nasajpour]

Ok, I updated the package definition as follow:

```
(define-public python-etebase
  (package
    (name "python-etebase")
    (version "0.31.2")
    (source (origin
             (method url-fetch)
             (uri (string-append 
"https://github.com/etesync/etebase-py/releases/download/v0.31.2/etebase-"; 
version "-cp38-cp38-manylinux2010_x86_64.whl"))
             (sha256
              (base32
               "09vw2922bfb0b8s2k0hs7skcrplwxkn4vfl9bcla6hbr92paigd7"))))
    (build-system trivial-build-system)
    (arguments
     `(#:modules ((guix build utils))
       #:builder (begin
                   (use-modules (guix build utils)
                                (srfi srfi-26))
                   (let* ((source     (assoc-ref %build-inputs "source"))
                          (bash       (assoc-ref %build-inputs "bash"))
                          (coreutils  (assoc-ref %build-inputs "coreutils"))
                          (python     (assoc-ref %build-inputs "python")))
                     (setenv "PATH" (string-append 
                                      (string-append bash       "/bin:")
                                      (string-append coreutils  "/bin:")
                                      (string-append python     "/bin:")))
                     (invoke "python3" "-m" "pip" "install"  source
                              (string-append "--prefix=" %output) 
                              "--no-deps"
                              (string-append "--cache-dir=" %output))
                                         #t))))
  (native-inputs `(("coreutils" ,coreutils)
                    ("python" ,python-3)
                    ("python-msgpack", python-msgpack)))
        (inputs `(("bash" ,bash)))
        (home-page "https://www.etesync.com/";)
    (synopsis "A Python library for Etebase")
    (description
     "This package is implemented in Rust and exposes a Python API for people 
to use.")
    (license license:expat)))
```

And currently I face with this error:

```
...
building 
/gnu/store/05bf6g974sjfl5kg2xkcs6ciiv4l9y67-python-etebase-0.31.2.drv...
Processing 
/gnu/store/g12ckz8jmmzmxf8bsjqxb2zksghf0x31-etebase-0.31.2-cp38-cp38-manylinux2010_x86_64.whl
Installing collected packages: g12ckz8jmmzmxf8bsjqxb2zksghf0x31
ERROR: Exception:
Traceback (most recent call last):
  File 
"/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/site-packages/pip/_internal/cli/base_command.py",
 line 188, in main
    status = self.run(options, args)
  File 
"/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/site-packages/pip/_internal/commands/install.py",
 line 398, in run
    installed = install_given_reqs(
  File 
"/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/site-packages/pip/_internal/req/__init__.py",
 line 54, in install_given_reqs
    requirement.install(
  File 
"/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/site-packages/pip/_internal/req/req_install.py",
 line 925, in install
    self.move_wheel_files(
  File 
"/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/site-packages/pip/_internal/req/req_install.py",
 line 453, in move_wheel_files
    wheel.move_wheel_files(
  File 
"/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/site-packages/pip/_internal/wheel.py",
 line 434, in move_wheel_files
    assert info_dir, "%s .dist-info directory not found" % req
AssertionError: g12ckz8jmmzmxf8bsjqxb2zksghf0x31==etebase .dist-info directory 
not found
Backtrace:
           3 (primitive-load "/gnu/store/vvgbg88axkan45hc0ahvska8y37?")
In ice-9/eval.scm:
   191:35  2 (_ _)
    619:8  1 (_ #(#(#(#(#<directory (guile-user) 7ffff3b?> ?) ?) ?) ?))
In guix/build/utils.scm:
    654:6  0 (invoke _ . _)

guix/build/utils.scm:654:6: In procedure invoke:
ERROR:
  1. &invoke-error:
      program: "python3"
      arguments: ("-m" "pip" "install" 
"/gnu/store/g12ckz8jmmzmxf8bsjqxb2zksghf0x31-etebase-0.31.2-cp38-cp38-manylinux2010_x86_64.whl"
 "--prefix=/gnu/store/m5a2yq2pdn6xkbmz7v9s18p0qwnrnqf8-python-etebase-0.31.2" 
"--no-deps" 
"--cache-dir=/gnu/store/m5a2yq2pdn6xkbmz7v9s18p0qwnrnqf8-python-etebase-0.31.2")
      exit-status: 2
      term-signal: #f
      stop-signal: #f
```