bug#26136: core-updates: address@hidden fails due to missing zlib

[Leo Famulari]

address@hidden is failing to build on core-updates:

https://hydra.gnu.org/build/1912761

I saw this near the beginning of the install phase:

------
configure: error: cannot run /bin/sh
/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13/Modules/_ctypes/libffi/config.sub
Failed to configure _ctypes module

Python build finished, but the necessary bits to build these modules
were not found:
_bsddb             _curses            _curses_panel   
_sqlite3           _ssl               _tkinter        
bsddb185           dbm                dl              
gdbm               imageop            readline        
sunaudiodev        zlib                               
To find the necessary bits, look in setup.py in detect_modules() for the
module's name.
------

And at the end, it fails:

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if test "xinstall" != "xno"  ; then \
        case install in \
                upgrade) ensurepip="--upgrade" ;; \
                install|*) ensurepip="" ;; \
        esac; \
        
LD_LIBRARY_PATH=/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13 
./python -E -m ensurepip \
                $ensurepip --root=/ ; \
fi
Traceback (most recent call last):
  File 
"/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13/Lib/runpy.py", line 
174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File 
"/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13/Lib/runpy.py", line 
72, in _run_code
    exec code in run_globals
  File 
"/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13/Lib/ensurepip/__main__.py",
 line 4, in <module>
    ensurepip._main()
  File 
"/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13/Lib/ensurepip/__init__.py",
 line 205, in _main
    default_pip=args.default_pip,
  File 
"/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13/Lib/ensurepip/__init__.py",
 line 108, in bootstrap
    _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File 
"/tmp/guix-build-python-minimal-2.7.13.drv-0/Python-2.7.13/Lib/ensurepip/__init__.py",
 line 31, in _run_pip
    import pip
zipimport.ZipImportError: can't decompress data; zlib not available
make: *** [Makefile:927: install] Error 1
phase `install' failed after 29.1 seconds
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