/usr/include/ncbi-vdb/klib/ is in libncbi-vdb-dev 2.8.1+dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ncbi-vdb/klib/btree.h
/usr/include/ncbi-vdb/klib/callconv.h
/usr/include/ncbi-vdb/klib/checksum.h
/usr/include/ncbi-vdb/klib/container.h
/usr/include/ncbi-vdb/klib/data-buffer.h
/usr/include/ncbi-vdb/klib/debug.h
/usr/include/ncbi-vdb/klib/defs.h
/usr/include/ncbi-vdb/klib/extern.h
/usr/include/ncbi-vdb/klib/impl.h
/usr/include/ncbi-vdb/klib/klib-priv.h
/usr/include/ncbi-vdb/klib/ksort-macro.h
/usr/include/ncbi-vdb/klib/log.h
/usr/include/ncbi-vdb/klib/logfmt.h
/usr/include/ncbi-vdb/klib/misc.h
/usr/include/ncbi-vdb/klib/namelist.h
/usr/include/ncbi-vdb/klib/namelist.hpp
/usr/include/ncbi-vdb/klib/ncbi-vdb-version.h
/usr/include/ncbi-vdb/klib/num-gen.h
/usr/include/ncbi-vdb/klib/out.h
/usr/include/ncbi-vdb/klib/pack.h
/usr/include/ncbi-vdb/klib/path-priv.h
/usr/include/ncbi-vdb/klib/path.h
/usr/include/ncbi-vdb/klib/pbstree.h
/usr/include/ncbi-vdb/klib/printf.h
/usr/include/ncbi-vdb/klib/progressbar.h
/usr/include/ncbi-vdb/klib/ptrie.h
/usr/include/ncbi-vdb/klib/rc.h
/usr/include/ncbi-vdb/klib/refcount.h
/usr/include/ncbi-vdb/klib/report.h
/usr/include/ncbi-vdb/klib/sort.h
/usr/include/ncbi-vdb/klib/sra-release-version.h
/usr/include/ncbi-vdb/klib/status.h
/usr/include/ncbi-vdb/klib/symbol.h
/usr/include/ncbi-vdb/klib/symtab.h
/usr/include/ncbi-vdb/klib/text.h
/usr/include/ncbi-vdb/klib/time.h
/usr/include/ncbi-vdb/klib/token.h
/usr/include/ncbi-vdb/klib/trie.h
/usr/include/ncbi-vdb/klib/vector.h
/usr/include/ncbi-vdb/klib/vlen-encode.h
/usr/include/ncbi-vdb/klib/writer.h