Mesa master: Problem loading newly compiled mesa

[enio]

Hello,

I have a Radeon HD 4890 and I've built mesa from git like this:

./autogen.sh --prefix=/usr
             --with-dri-driverdir=/usr/lib/xorg/modules/dri
             --with-dri-drivers=
             --with-gallium-drivers=r600
             --with-egl-platforms=x11,drm
             --enable-gallium-llvm
             --enable-gallium-egl
             --disable-gallium-gbm
             --enable-gallium-g3dvl
             --enable-egl
             --enable-gbm
             --disable-debug
             --enable-gles1
             --enable-gles2
             --enable-openvg
             --enable-glx-tls
             --enable-texture-float
             --enable-shared-glapi
             --disable-d3d1x

and then make, but not make install.
The problem is that it won't load the new driver.

$ export LIBGL_DRIVERS_PATH=lib
$ LIBGL_DEBUG=verbose glxinfo 2>&1 >/dev/null | grep so$
libGL: OpenDriver: trying lib/tls/r600_dri.so
libGL: OpenDriver: trying lib/r600_dri.so
libGL error: unable to load driver: r600_dri.so
libGL: OpenDriver: trying lib/tls/swrast_dri.so
libGL: OpenDriver: trying lib/swrast_dri.so
libGL error: unable to load driver: swrast_dri.so

$ export LD_LIBRARY_PATH=lib
$ ldd lib/libGLESv2.so | grep glapi
        libglapi.so.0 => lib/libglapi.so.0 (0x00007f8a0f5e2000)

$ export EGL_DRIVERS_PATH=lib/egl
$ EGL_LOG_LEVEL=debug test_application 2>&1 >/dev/null | grep '\.so'
$

When running Nexuiz, it reports that it is using Mesa 8.0.4-1 which is the version that comes with the system (Debian unstable, linux 3.5-0 amd64).
edit: When running Nexuiz like this, things are broken: no textures and player models are no tvisible.

Any ideas how to do this right?

Thanks