Linking to non-standard paths?

Hi,

how can I install mlt, mlt++ and kdenlive to some non-standard prefix while keeping the normal installation in /usr/local/ intact? I installed mlt into ${HOME}/local-mlt/ and am now trying the same with mlt++ using the following lines in a small installer script:

PKG_CONFIG_PATH="${HOME}/local-mlt/lib/pkgconfig":${PKG_CONFIG_PATH}
./configure --prefix=${HOME}/local-mlt++/ && make && make install

It seems to work fine, but ldd on the mlt++-libs shows:

~ $ ldd local-mlt++/lib/libmlt++.so
        linux-vdso.so.1 =>  (0x00007fffa53fe000)
        libmlt.so.1 => /usr/lib/libmlt.so.1 (0x00007f599cf07000)
        libmiracle.so.1 => /usr/lib/libmiracle.so.1 (0x00007f599ccf9000)
        libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/libstdc++.so.6 (0x00007f599c9f5000)
        libm.so.6 => /lib/libm.so.6 (0x00007f599c774000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f599c566000)
        libc.so.6 => /lib/libc.so.6 (0x00007f599c226000)
        libdl.so.2 => /lib/libdl.so.2 (0x00007f599c022000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00007f599be07000)
        libvalerie.so.1 => /usr/lib/libvalerie.so.1 (0x00007f599bbfb000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f599d383000)

So obviously mlt++ looks only into the standard paths for the mlt libraries. Am I missing something or should I hack into the Makefiles to pass an rpath option to the linker?