autopkgtest failures on s390x

cryfs' dep8 tests are currently failing on s390x:

https://autopkgtest.ubuntu.com/results/autopkgtest-kinetic/kinetic/s390x/c/cryfs/20221016_082438_404d7@/log.gz

[----------] 2 tests from CryConfigCompatibilityTest
[ RUN ] CryConfigCompatibilityTest.v0_8_1_with_aes_256_gcm
[2022-09-02 06:17:36.994] [Log] [error] Error deserializing outer configuration: Deserialization failed - size overflow
unknown file: Failure
C++ exception with description "Tried to get right side of an either which is left." thrown in the test body.
[ FAILED ] CryConfigCompatibilityTest.v0_8_1_with_aes_256_gcm (1 ms)
[ RUN ] CryConfigCompatibilityTest.v0_8_1_with_serpent_128_cfb
[2022-09-02 06:17:36.995] [Log] [error] Error deserializing outer configuration: Deserialization failed - size overflow
unknown file: Failure
C++ exception with description "Tried to get right side of an either which is left." thrown in the test body.
[ FAILED ] CryConfigCompatibilityTest.v0_8_1_with_serpent_128_cfb (1 ms)
[----------] 2 tests from CryConfigCompatibilityTest (3 ms total)

This is also affecting Debian:

https://ci.debian.net/data/autopkgtest/unstable/s390x/c/cryfs/25603505/log.gz