I forgot to react, but `:any` indeed seemed to fix the normal builds on
all (.deb) distros which we test.
- Bug#1127713: knot-resolver FTCBFS: unsatisfiable host py... Helmut Grohne
- Bug#1127713: knot-resolver FTCBFS: unsatisfiable ho... Vladimír Čunát
- Bug#1127713: knot-resolver FTCBFS: unsatisfiabl... Helmut Grohne
- Bug#1127713: knot-resolver FTCBFS: unsatisf... Vladimír Čunát

