Para SLE 15 SP4 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:sumaform:tools:avahi:0.7/SLE_15_SP4/systemsmanagement:sumaform:tools:avahi:0.7.repo
zypper refresh
zypper install libhowl0
Para SLE 15 SP3 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:sumaform:tools:avahi:0.7/SLE_15_SP3/systemsmanagement:sumaform:tools:avahi:0.7.repo
zypper refresh
zypper install libhowl0
Para SLE 15 SP2 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:sumaform:tools:avahi:0.7/SLE_15_SP2/systemsmanagement:sumaform:tools:avahi:0.7.repo
zypper refresh
zypper install libhowl0