squashfs-tools from home:Alexx2000 project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 15.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Alexx2000/openSUSE_Leap_15.1/home:Alexx2000.repo zypper refresh zypper install squashfs-tools