mingw64-mono-debug from home:rhabacker:branches:windows:mingw:win64 project

For openSUSE Leap 15.5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:rhabacker:branches:windows:mingw:win64/openSUSE_Leap_15.5/home:rhabacker:branches:windows:mingw:win64.repo
zypper refresh
zypper install mingw64-mono-debug

For openSUSE Leap 15.4 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:rhabacker:branches:windows:mingw:win64/openSUSE_Leap_15.4/home:rhabacker:branches:windows:mingw:win64.repo
zypper refresh
zypper install mingw64-mono-debug