python-minimal@2.7.13 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: ------ 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 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 ------