Procedure for building zectl for Proxmox 7

prox_buildzectl.sh

# Make a new Proxmox 7.4 VM
# Set the processor type to 'Host'
# Add a single disk. I use a VirtIO Block device.
# Pick OVMF (UEFI)
# On first boot, enter the BIOS and disable Secure Boot
# When installing, pick ZFS RAID0
# After reboot, ssh in so you can paste

   rm /etc/apt/sources.list.d/pve-enterprise.list 
   echo 'deb http://download.proxmox.com/debian/pve bullseye pve-no-subscription' > /etc/apt/sources.list.d/pve-no-subscription.list
   apt update

   apt install build-essential git libzfslinux-dev libzfs4linux cmake check
   apt install linux-headers-amd64 linux-image-amd64 linux-headers-5.10.0-20-amd64
   apt install pkg-config libblkid-dev zlib1g-dev

   git clone https://github.com/johnramsden/zectl.git
   cd zectl/
   git remote add truenas https://github.com/truenas/zectl.git
   git remote update

   mkdir build && cd build
   cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DPLUGINS_DIRECTORY=/usr/share/zectl/libze_plugin -DCMAKE_BUILD_TYPE=Debug
   make

   mkdir -p root/usr/bin
   mkdir -p root/usr/share/zectl/libze_plugin
   mkdir -p root/usr/include/libze
   mkdir -p root/usr/lib
   cp src/zectl root/usr/bin/
   cp lib/libze/libze.so root/usr/lib/
   cp lib/libze_plugin/libze_plugin_systemdboot.so root/usr/share/zectl/libze_plugin/
   cp ../include/libze/libze.h root/usr/include/libze/
   cp ../include/libze/libze_* root/usr/include/libze/
   cd root
   tar zcvf ../zectl.tgz .

# Copy the tarball to the target Proxmox install

   cd /
   tar zxvf /root/zectl.tgz

# Test

   zectl list