The original bug does not include the make.log mentioned in the build error. Here is a make log, which at least results in the same error code.
NB this is for a slightly different system, being DKMS make.log for v4l2loopback-0.12.3 for kernel 5.8.0-25-generic (x86_64) ** Attachment added: "make.log" https://bugs.launchpad.net/ubuntu/+source/v4l2loopback/+bug/1880598/+attachment/5433922/+files/make.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880598 Title: package v4l2loopback-dkms 0.12.3-1 failed to install/upgrade: installed v4l2loopback-dkms package post-installation script subprocess returned error exit status 10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/v4l2loopback/+bug/1880598/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs