/usr/include/ is in sphinxtrain-dev 1.0.8-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/sphinxtrain/
/usr/include/sphinxtrain/s3gau_io.h
/usr/include/sphinxtrain/metric.h
/usr/include/sphinxtrain/cvt2triphone.h
/usr/include/sphinxtrain/vector.h
/usr/include/sphinxtrain/s3cb2mllr_io.h
/usr/include/sphinxtrain/kmeans.h
/usr/include/sphinxtrain/s3map_io.h
/usr/include/sphinxtrain/mllr_class_io.h
/usr/include/sphinxtrain/quest.h
/usr/include/sphinxtrain/mk_trans_seq.h
/usr/include/sphinxtrain/ck_seg.h
/usr/include/sphinxtrain/s3phseg_io.h
/usr/include/sphinxtrain/mk_ts2ci.h
/usr/include/sphinxtrain/s3mixw_io.h
/usr/include/sphinxtrain/s3io.h
/usr/include/sphinxtrain/s3ts2cb_io.h
/usr/include/sphinxtrain/mk_sseq.h
/usr/include/sphinxtrain/itree.h
/usr/include/sphinxtrain/s3.h
/usr/include/sphinxtrain/time.h
/usr/include/sphinxtrain/state_seq.h
/usr/include/sphinxtrain/s3lamb_io.h
/usr/include/sphinxtrain/s3tmat_io.h
/usr/include/sphinxtrain/mllr.h
/usr/include/sphinxtrain/common.h
/usr/include/sphinxtrain/file.h
/usr/include/sphinxtrain/model_def_io.h
/usr/include/sphinxtrain/mk_phone_seq.h
/usr/include/sphinxtrain/gauden.h
/usr/include/sphinxtrain/lexicon.h
/usr/include/sphinxtrain/corpus.h
/usr/include/sphinxtrain/misc.h
/usr/include/sphinxtrain/heap.h
/usr/include/sphinxtrain/was_added.h
/usr/include/sphinxtrain/segdmp.h
/usr/include/sphinxtrain/pset_io.h
/usr/include/sphinxtrain/div.h
/usr/include/sphinxtrain/s3acc_io.h
/usr/include/sphinxtrain/acmod_set.h
/usr/include/sphinxtrain/remap.h
/usr/include/sphinxtrain/kdtree.h
/usr/include/sphinxtrain/mk_phone_list.h
/usr/include/sphinxtrain/best_q.h
/usr/include/sphinxtrain/model_def.h
/usr/include/sphinxtrain/mllr_io.h
/usr/include/sphinxtrain/swap.h
/usr/include/sphinxtrain/model_inventory.h
/usr/include/sphinxtrain/state.h
/usr/include/sphinxtrain/dtree.h
/usr/include/sphinxtrain/topo_read.h
/usr/include/sphinxtrain/ts2cb.h