make dist fails

Hi
With
```
./autogen.sh --prefix=//tmp/msdk/libva/usr --libdir=/usr/lib/x86_64-linux-gnu --enable-wayland=no && \
make -j$(nproc) && \
make install && \
make dist
```
make dist reports:
```
make[2]: Leaving directory `/tmp/msdk/libva/va/drm'
(cd wayland && make top_distdir=../../libva-2.4.0.pre1 distdir=../../libva-2.4.0.pre1/va/wayland \
am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)
make[2]: Entering directory `/tmp/msdk/libva/va/wayland'
GEN wayland-drm-client-protocol.h
[91m/bin/bash: client-header: command not found
[91mmake[2]: *** [wayland-drm-client-protocol.h] Error 127
[0mmake[2]: Leaving directory `/tmp/msdk/libva/va/wayland'
[91mmake[1]: *** [distdir] Error 1
[0mmake[1]: Leaving directory `/tmp/msdk/libva/va'
[91mmake: *** [distdir] Error 1
```
Any thoughts?
Cheers,