Unicode 7.0 was recently released and unicode-data 7.0-1 was uploaded.
The boost1.54 source package contains embedded data copies of several
files from the unicode-data package:
boost/spirit/home/support/char_encoding/unicode/UnicodeData.txt
boost/spirit/home/support/char_encoding/unicode/Scripts.txt
boost/spirit/home/support/char_encoding/unicode/PropList.txt
boost/spirit/home/support/char_encoding/unicode/DerivedCoreProperties.txt
Upstream appears to have converted those files into these files before
releasing the tarball. One of those files (query.hpp) is generated by a
python script that is not available in the source package, I think this
is therefore a severity serious bug but I'm not sure.
boost/spirit/home/support/char_encoding/unicode/query.hpp
boost/spirit/home/support/char_encoding/unicode/uppercase_table.hpp
boost/spirit/home/support/char_encoding/unicode/category_table.hpp
boost/spirit/home/support/char_encoding/unicode/script_table.hpp
boost/spirit/home/support/char_encoding/unicode/lowercase_table.hpp
These files are then shipped in the libboost1.54-dev binary package.
Please ask upstream to remove the above files from the source package
and instead build-depend on the unicode-data binary package, convert the
relevant files to headers at build time and add a Built-Using header:
https://www.debian.org/doc/debian-policy/ch-relationships.html#s-built-using