Your message dated Mon, 04 May 2026 00:07:16 +0000
with message-id <[email protected]>
and subject line Bug#1135447: fixed in python-nacl 1.6.2-2
has caused the Debian Bug report #1135447,
regarding python-signedjson: FTBFS: ModuleNotFoundError: No module named 
'_cffi_backend'
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact [email protected]
immediately.)


-- 
1135447: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1135447
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: src:python-signedjson
Version: 1.1.4-3
Severity: serious
Tags: ftbfs forky sid

Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202605/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:python-signedjson, so that this is still
visible in the BTS web page for this package.

Thanks.

--------------------------------------------------------------------------------
[...]
 debian/rules clean
dh clean --buildsystem=pybuild
   dh_auto_clean -O--buildsystem=pybuild
   dh_autoreconf_clean -O--buildsystem=pybuild
   dh_clean -O--buildsystem=pybuild
 debian/rules binary
dh binary --buildsystem=pybuild
   dh_update_autotools_config -O--buildsystem=pybuild
   dh_autoreconf -O--buildsystem=pybuild
   dh_auto_configure -O--buildsystem=pybuild
   dh_auto_build -O--buildsystem=pybuild
I: pybuild plugin_pyproject:142: Building wheel for python3.14 with "build" 
module
I: pybuild base:385: python3.14 -m build --skip-dependency-check --no-isolation 
--wheel --outdir /<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson  
* Building wheel...
<string>:29: DeprecationWarning: codecs.open() is deprecated. Use open() 
instead.
toml section missing PosixPath('pyproject.toml') does not contain a 
tool.setuptools_scm section
toml section missing PosixPath('pyproject.toml') does not contain a 
tool.setuptools_scm section
running bdist_wheel
running build
running build_py
creating build/lib/signedjson
copying signedjson/__init__.py -> build/lib/signedjson
copying signedjson/types.py -> build/lib/signedjson
copying signedjson/key.py -> build/lib/signedjson
copying signedjson/sign.py -> build/lib/signedjson
copying signedjson/py.typed -> build/lib/signedjson
installing to build/bdist.linux-x86_64/wheel
running install
running install_lib
creating build/bdist.linux-x86_64/wheel
creating build/bdist.linux-x86_64/wheel/signedjson
copying build/lib/signedjson/__init__.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/types.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/key.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/sign.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/py.typed -> 
build/bdist.linux-x86_64/wheel/./signedjson
running install_egg_info
running egg_info
creating signedjson.egg-info
writing signedjson.egg-info/PKG-INFO
writing dependency_links to signedjson.egg-info/dependency_links.txt
writing requirements to signedjson.egg-info/requires.txt
writing top-level names to signedjson.egg-info/top_level.txt
writing manifest file 'signedjson.egg-info/SOURCES.txt'
reading manifest file 'signedjson.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching '.idea'
adding license file 'LICENSE'
writing manifest file 'signedjson.egg-info/SOURCES.txt'
Copying signedjson.egg-info to 
build/bdist.linux-x86_64/wheel/./signedjson-1.1.4.egg-info
running install_scripts
creating build/bdist.linux-x86_64/wheel/signedjson-1.1.4.dist-info/WHEEL
creating 
'/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/.tmp-oqm6aqjh/signedjson-1.1.4-py3-none-any.whl'
 and adding 'build/bdist.linux-x86_64/wheel' to it
adding 'signedjson/__init__.py'
adding 'signedjson/key.py'
adding 'signedjson/py.typed'
adding 'signedjson/sign.py'
adding 'signedjson/types.py'
adding 'signedjson-1.1.4.dist-info/licenses/LICENSE'
adding 'signedjson-1.1.4.dist-info/METADATA'
adding 'signedjson-1.1.4.dist-info/WHEEL'
adding 'signedjson-1.1.4.dist-info/top_level.txt'
adding 'signedjson-1.1.4.dist-info/RECORD'
removing build/bdist.linux-x86_64/wheel
Successfully built signedjson-1.1.4-py3-none-any.whl
I: pybuild plugin_pyproject:168: Unpacking wheel built for python3.14 with 
"installer" module
I: pybuild plugin_pyproject:142: Building wheel for python3.13 with "build" 
module
I: pybuild base:385: python3.13 -m build --skip-dependency-check --no-isolation 
--wheel --outdir /<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson  
* Building wheel...
toml section missing PosixPath('pyproject.toml') does not contain a 
tool.setuptools_scm section
toml section missing PosixPath('pyproject.toml') does not contain a 
tool.setuptools_scm section
running bdist_wheel
running build
running build_py
installing to build/bdist.linux-x86_64/wheel
running install
running install_lib
creating build/bdist.linux-x86_64/wheel
creating build/bdist.linux-x86_64/wheel/signedjson
copying build/lib/signedjson/__init__.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/types.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/key.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/sign.py -> 
build/bdist.linux-x86_64/wheel/./signedjson
copying build/lib/signedjson/py.typed -> 
build/bdist.linux-x86_64/wheel/./signedjson
running install_egg_info
running egg_info
writing signedjson.egg-info/PKG-INFO
writing dependency_links to signedjson.egg-info/dependency_links.txt
writing requirements to signedjson.egg-info/requires.txt
writing top-level names to signedjson.egg-info/top_level.txt
reading manifest file 'signedjson.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching '.idea'
adding license file 'LICENSE'
writing manifest file 'signedjson.egg-info/SOURCES.txt'
Copying signedjson.egg-info to 
build/bdist.linux-x86_64/wheel/./signedjson-1.1.4.egg-info
running install_scripts
creating build/bdist.linux-x86_64/wheel/signedjson-1.1.4.dist-info/WHEEL
creating 
'/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/.tmp-rql0a2vt/signedjson-1.1.4-py3-none-any.whl'
 and adding 'build/bdist.linux-x86_64/wheel' to it
adding 'signedjson/__init__.py'
adding 'signedjson/key.py'
adding 'signedjson/py.typed'
adding 'signedjson/sign.py'
adding 'signedjson/types.py'
adding 'signedjson-1.1.4.dist-info/licenses/LICENSE'
adding 'signedjson-1.1.4.dist-info/METADATA'
adding 'signedjson-1.1.4.dist-info/WHEEL'
adding 'signedjson-1.1.4.dist-info/top_level.txt'
adding 'signedjson-1.1.4.dist-info/RECORD'
removing build/bdist.linux-x86_64/wheel
Successfully built signedjson-1.1.4-py3-none-any.whl
I: pybuild plugin_pyproject:168: Unpacking wheel built for python3.13 with 
"installer" module
   dh_auto_test -O--buildsystem=pybuild
W: pybuild base:328: No test runner selected, defaulting to unittest, ignoring 
test discovery problems.
Use --test-unittest to explicitly select the unittest runner.
I: pybuild base:385: cd 
/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build; python3.14 -m 
unittest discover -v 
tests.test_key (unittest.loader._FailedTest.tests.test_key) ... ERROR
tests.test_known_key (unittest.loader._FailedTest.tests.test_known_key) ... 
ERROR
tests.test_sign (unittest.loader._FailedTest.tests.test_sign) ... ERROR

======================================================================
ERROR: tests.test_key (unittest.loader._FailedTest.tests.test_key)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.test_key
Traceback (most recent call last):
  File "/usr/lib/python3.14/unittest/loader.py", line 426, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.14/unittest/loader.py", line 367, in 
_get_module_from_name
    __import__(name)
    ~~~~~~~~~~^^^^^^
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build/tests/test_key.py", 
line 3, in <module>
    from signedjson.key import (
    ...<11 lines>...
    )
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build/signedjson/key.py", 
line 20, in <module>
    import nacl.signing
  File "/usr/lib/python3/dist-packages/nacl/signing.py", line 16, in <module>
    import nacl.bindings
  File "/usr/lib/python3/dist-packages/nacl/bindings/__init__.py", line 16, in 
<module>
    from nacl.bindings.crypto_aead import (
    ...<42 lines>...
    )
  File "/usr/lib/python3/dist-packages/nacl/bindings/crypto_aead.py", line 17, 
in <module>
    from nacl._sodium import ffi, lib
ModuleNotFoundError: No module named '_cffi_backend'


======================================================================
ERROR: tests.test_known_key (unittest.loader._FailedTest.tests.test_known_key)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.test_known_key
Traceback (most recent call last):
  File "/usr/lib/python3.14/unittest/loader.py", line 426, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.14/unittest/loader.py", line 367, in 
_get_module_from_name
    __import__(name)
    ~~~~~~~~~~^^^^^^
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build/tests/test_known_key.py",
 line 19, in <module>
    import nacl.signing
  File "/usr/lib/python3/dist-packages/nacl/signing.py", line 16, in <module>
    import nacl.bindings
  File "/usr/lib/python3/dist-packages/nacl/bindings/__init__.py", line 16, in 
<module>
    from nacl.bindings.crypto_aead import (
    ...<42 lines>...
    )
  File "/usr/lib/python3/dist-packages/nacl/bindings/crypto_aead.py", line 17, 
in <module>
    from nacl._sodium import ffi, lib
ModuleNotFoundError: No module named '_cffi_backend'


======================================================================
ERROR: tests.test_sign (unittest.loader._FailedTest.tests.test_sign)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.test_sign
Traceback (most recent call last):
  File "/usr/lib/python3.14/unittest/loader.py", line 426, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.14/unittest/loader.py", line 367, in 
_get_module_from_name
    __import__(name)
    ~~~~~~~~~~^^^^^^
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build/tests/test_sign.py", 
line 21, in <module>
    from signedjson.sign import (
    ...<4 lines>...
    )
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build/signedjson/sign.py", 
line 25, in <module>
    from signedjson.key import SUPPORTED_ALGORITHMS
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build/signedjson/key.py", 
line 20, in <module>
    import nacl.signing
  File "/usr/lib/python3/dist-packages/nacl/signing.py", line 16, in <module>
    import nacl.bindings
  File "/usr/lib/python3/dist-packages/nacl/bindings/__init__.py", line 16, in 
<module>
    from nacl.bindings.crypto_aead import (
    ...<42 lines>...
    )
  File "/usr/lib/python3/dist-packages/nacl/bindings/crypto_aead.py", line 17, 
in <module>
    from nacl._sodium import ffi, lib
ModuleNotFoundError: No module named '_cffi_backend'


----------------------------------------------------------------------
Ran 3 tests in 0.000s

FAILED (errors=3)
E: pybuild pybuild:485: test: plugin pyproject failed with: exit code=1: cd 
/<<PKGBUILDDIR>>/.pybuild/cpython3_3.14_signedjson/build; python3.14 -m 
unittest discover -v 
W: pybuild base:328: No test runner selected, defaulting to unittest, ignoring 
test discovery problems.
Use --test-unittest to explicitly select the unittest runner.
I: pybuild base:385: cd 
/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build; python3.13 -m 
unittest discover -v 
tests.test_key (unittest.loader._FailedTest.tests.test_key) ... ERROR
tests.test_known_key (unittest.loader._FailedTest.tests.test_known_key) ... 
ERROR
tests.test_sign (unittest.loader._FailedTest.tests.test_sign) ... ERROR

======================================================================
ERROR: tests.test_key (unittest.loader._FailedTest.tests.test_key)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.test_key
Traceback (most recent call last):
  File "/usr/lib/python3.13/unittest/loader.py", line 396, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.13/unittest/loader.py", line 339, in 
_get_module_from_name
    __import__(name)
    ~~~~~~~~~~^^^^^^
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build/tests/test_key.py", 
line 3, in <module>
    from signedjson.key import (
    ...<11 lines>...
    )
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build/signedjson/key.py", 
line 20, in <module>
    import nacl.signing
  File "/usr/lib/python3/dist-packages/nacl/signing.py", line 16, in <module>
    import nacl.bindings
  File "/usr/lib/python3/dist-packages/nacl/bindings/__init__.py", line 16, in 
<module>
    from nacl.bindings.crypto_aead import (
    ...<42 lines>...
    )
  File "/usr/lib/python3/dist-packages/nacl/bindings/crypto_aead.py", line 17, 
in <module>
    from nacl._sodium import ffi, lib
ModuleNotFoundError: No module named '_cffi_backend'


======================================================================
ERROR: tests.test_known_key (unittest.loader._FailedTest.tests.test_known_key)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.test_known_key
Traceback (most recent call last):
  File "/usr/lib/python3.13/unittest/loader.py", line 396, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.13/unittest/loader.py", line 339, in 
_get_module_from_name
    __import__(name)
    ~~~~~~~~~~^^^^^^
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build/tests/test_known_key.py",
 line 19, in <module>
    import nacl.signing
  File "/usr/lib/python3/dist-packages/nacl/signing.py", line 16, in <module>
    import nacl.bindings
  File "/usr/lib/python3/dist-packages/nacl/bindings/__init__.py", line 16, in 
<module>
    from nacl.bindings.crypto_aead import (
    ...<42 lines>...
    )
  File "/usr/lib/python3/dist-packages/nacl/bindings/crypto_aead.py", line 17, 
in <module>
    from nacl._sodium import ffi, lib
ModuleNotFoundError: No module named '_cffi_backend'


======================================================================
ERROR: tests.test_sign (unittest.loader._FailedTest.tests.test_sign)
----------------------------------------------------------------------
ImportError: Failed to import test module: tests.test_sign
Traceback (most recent call last):
  File "/usr/lib/python3.13/unittest/loader.py", line 396, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.13/unittest/loader.py", line 339, in 
_get_module_from_name
    __import__(name)
    ~~~~~~~~~~^^^^^^
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build/tests/test_sign.py", 
line 21, in <module>
    from signedjson.sign import (
    ...<4 lines>...
    )
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build/signedjson/sign.py", 
line 25, in <module>
    from signedjson.key import SUPPORTED_ALGORITHMS
  File 
"/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build/signedjson/key.py", 
line 20, in <module>
    import nacl.signing
  File "/usr/lib/python3/dist-packages/nacl/signing.py", line 16, in <module>
    import nacl.bindings
  File "/usr/lib/python3/dist-packages/nacl/bindings/__init__.py", line 16, in 
<module>
    from nacl.bindings.crypto_aead import (
    ...<42 lines>...
    )
  File "/usr/lib/python3/dist-packages/nacl/bindings/crypto_aead.py", line 17, 
in <module>
    from nacl._sodium import ffi, lib
ModuleNotFoundError: No module named '_cffi_backend'


----------------------------------------------------------------------
Ran 3 tests in 0.000s

FAILED (errors=3)
E: pybuild pybuild:485: test: plugin pyproject failed with: exit code=1: cd 
/<<PKGBUILDDIR>>/.pybuild/cpython3_3.13_signedjson/build; python3.13 -m 
unittest discover -v 
dh_auto_test: error: pybuild --test -i python{version} -p "3.14 3.13" 
--parallel=2 returned exit code 13
make: *** [debian/rules:6: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit 
status 2
--------------------------------------------------------------------------------

--- End Message ---
--- Begin Message ---
Source: python-nacl
Source-Version: 1.6.2-2
Done: Colin Watson <[email protected]>

We believe that the bug you reported is fixed in the latest version of
python-nacl, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Colin Watson <[email protected]> (supplier of updated python-nacl package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Sun, 03 May 2026 19:52:11 +0100
Source: python-nacl
Architecture: source
Version: 1.6.2-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <[email protected]>
Changed-By: Colin Watson <[email protected]>
Closes: 1135447
Changes:
 python-nacl (1.6.2-2) unstable; urgency=medium
 .
   * Restore missing cffi-backend dependencies (closes: #1135447).
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Git-Tag-Info: tag=2b7bc0cd2badb2057b04787479aeb574df328fa9 
fp=ac0a4ff12611b6fccf01c111393587d97d86500b
Git-Tag-Tagger: Colin Watson <[email protected]>

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--- End Message ---

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