# Libzymkeyssl upgrade fails

**URL:** <https://community.zymbit.com/t/libzymkeyssl-upgrade-fails/1747>\
**Category:** ZYMKEY4\
**Created:** [March 31, 2025, 12:49pm UTC](https://community.zymbit.com/t/libzymkeyssl-upgrade-fails/1747 "2025-03-31T12:49:44Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![afunix](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.zymbit.com/afunix/32/412_2.png) [@afunix](https://community.zymbit.com/u/afunix)\
**Post date:** [March 31, 2025, 12:49pm UTC](https://community.zymbit.com/t/libzymkeyssl-upgrade-fails/1747/1 "2025-03-31T12:49:44Z")

</div>

One of Pi’s on Debian failed to upgrade libzymkeyssl:

```auto
# dpkg --configure -a
Setting up libzymkeyssl (1.0-12) ...
/var/lib/dpkg/info/libzymkeyssl.postinst: line 5: [: /usr/lib/arm-linux-gnueabihf/engines-1.1: binary operator expected
cp: target '/usr/lib/aarch64-linux-gnu/engines-1.1/zymkey_ssl.so' is not a directory
dpkg: error processing package libzymkeyssl (--configure):
 installed libzymkeyssl package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 libzymkeyssl

# dpkg -l | grep libzymkeyssl
iF libzymkeyssl 1.0-12 arm64 Zymkey SSL Engine Library

# cat /etc/debian_version 
11.11

# uname -a
Linux pi-nessus 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/Linux

# find /usr/lib -name "engines-1.1"
/usr/lib/arm-linux-gnueabihf/engines-1.1
/usr/lib/aarch64-linux-gnu/engines-1.1

```