disable pulseaudio don't work

./configure -nomake examples -nomake tests -opensource -confirm-license -no-pch -debug -opengl desktop -c++11 -no-pulseaudio
Do:
Using extra options found in /mnt/perso/progs/qt/qt-everywhere-opensource-src-5.4.0/qtwebengine/src/core/qmake_extras.gypi
Using extra options found in /mnt/perso/progs/qt/qt-everywhere-opensource-src-5.4.0/qtwebengine/src/core/qtwebengine_extras.gypi
Updating projects from gyp files...
Package libpulse was not found in the pkg-config search path.
Perhaps you should add the directory containing `libpulse.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libpulse' found
gyp: Call to 'pkg-config --cflags libpulse' returned exit status 1.
Project ERROR: – running gyp_qtwebengine failed –

Then pulse audio disabling don't work!