buildpackage permission denied

 dpkg-source --before-build log4qt-1.0
 fakeroot debian/rules clean
 dpkg-source -b log4qt-1.0
 debian/rules build
DESTDIR is not empty, CMAKE_INSTALL_PREFIX cleaned
Building project Log4Qt

Configuration
-------------
CMAKE_BUILD_TYPE        = Release
CXXFLAGS                = -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security
CMAKE_CXX_FLAGS         = -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security
LDFLAGS                 = -Wl,-Bsymbolic-functions -Wl,-z,relro
CMAKE_EXE_LINKER_FLAGS  =  -Wl,-Bsymbolic-functions -Wl,-z,relro
CMAKE_INSTALL_PREFIX    =
INSTALL_DIR             = /usr

With QT_USE_QTSQL DatabaseAppender, DatabaseLayout compiled
With QT_USE_QTNETWORK TelnetAppender compiled
CMAKE_INSTALL_PREFIX =

BIN_INSTALL_DIR         = /usr/bin
LIB_INSTALL_DIR         = /usr/lib
INCLUDE_INSTALL_DIR     = /usr/include/log4qt
CMAKECONFIG_INSTALL_DIR = /usr/lib/cmake/Log4Qt

 fakeroot debian/rules binary
CMake Error at cmake_install.cmake:49 (FILE):
  file INSTALL cannot copy file
  "/home/alexey/dev/log4qt/log4qt-1.0/lib/libLog4Qt.so.1.0.0" to
  "/usr/lib/libLog4Qt.so.1.0.0".


make[2]: *** [install] Error 1
make[1]: *** [override_dh_auto_install] Error 2
make: *** [binary] Error 2
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2