Yes, the build dep is properly set to libjack-jackd2-dev in the debian package, but there is a bug in the source code, in the configure.in file (line 66)
PKG_CHECK_MODULES(JACK, jack >= 0.102.0) Therefore you can download the source and try to compile against libjack-dev version 1:0.102. The configure script wont find the problem and the compilation will fail, as lingot uses the identifier 'JackPortIsActive', only available in the new API (that was my mistake). My intention is to avoid using the former identifier, so we can downgrade the dependency to libjack-dev 1:0.102. Ibán.