Doesn't work on 9.5.5, second test fails

[entvia]

Hi! Maybe I am missing something, but on my local PostgreSQL 9.5.5
instance it doesn't work. The installation goes through as expected, but when I run the tests the 2nd test fails. "HINT: No function matches the given name and argument types. You might need to add explicit type casts." When I try to call substring_similarity manually I get the same error. Is there a way to fix it? Will attach both output files.

regression.diffs.txt
regression.out.txt

UPD: local issue, make install tries to install to 9.6 folder