/usr/ is in libspice-client-glib-2.0-dev 0.22-0nocelt2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/spice-client-glib-2.0.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/spice-controller.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libspice-client-glib-2.0-dev/
/usr/share/doc/libspice-client-glib-2.0-dev/copyright
/usr/share/vala/
/usr/share/vala/vapi/
/usr/share/vala/vapi/spice-client-glib-2.0.deps
/usr/share/vala/vapi/spice-protocol.vapi
/usr/share/vala/vapi/spice-client-glib-2.0.vapi
/usr/share/gir-1.0/
/usr/share/gir-1.0/SpiceClientGLib-2.0.gir
/usr/include/
/usr/include/spice-controller/
/usr/include/spice-controller/spice-controller.h
/usr/include/spice-client-glib-2.0/
/usr/include/spice-client-glib-2.0/channel-playback.h
/usr/include/spice-client-glib-2.0/spice-client.h
/usr/include/spice-client-glib-2.0/channel-record.h
/usr/include/spice-client-glib-2.0/spice-channel-enums.h
/usr/include/spice-client-glib-2.0/channel-inputs.h
/usr/include/spice-client-glib-2.0/channel-usbredir.h
/usr/include/spice-client-glib-2.0/channel-smartcard.h
/usr/include/spice-client-glib-2.0/spice-session.h
/usr/include/spice-client-glib-2.0/spice-audio.h
/usr/include/spice-client-glib-2.0/channel-display.h
/usr/include/spice-client-glib-2.0/channel-cursor.h
/usr/include/spice-client-glib-2.0/spice-option.h
/usr/include/spice-client-glib-2.0/spice-util.h
/usr/include/spice-client-glib-2.0/spice-glib-enums.h
/usr/include/spice-client-glib-2.0/spice-types.h
/usr/include/spice-client-glib-2.0/channel-port.h
/usr/include/spice-client-glib-2.0/smartcard-manager.h
/usr/include/spice-client-glib-2.0/usb-device-manager.h
/usr/include/spice-client-glib-2.0/channel-main.h
/usr/include/spice-client-glib-2.0/spice-channel.h
/usr/lib/x86_64-linux-gnu/libspice-client-glib-2.0.so
/usr/lib/x86_64-linux-gnu/libspice-controller.so
/usr/share/doc/libspice-client-glib-2.0-dev/changelog.Debian.gz