Hi,I was able to get the package installed by symlinking the test-SSE3 binary to test-sse3
ln -s /usr/libexec/x86_64-linux-gnu/isa-support/test-SSE3 /usr/libexec/x86_64-linux-gnu/isa-support/test-sse3
hope that helps someone else as well... cheers Philipp