A few solvable problems so far: 1. One must move the $KDEDIR/include/plugin.h out of the way. 2. If one want VST capabilities, one needs set the environment variables FST_CFLAGS and FST_LIBS to either one's jack-fst source directory and the fst.exe.so or to the muse directory (for want of anything else!) and /usr/bin/fst.exe.so if fst was installed from Debian Sid (it's there now!) 3. One does need fst.h from jack-fst sources if one wants VST capabilities so if you installed from Sid and do not have an old one around, you need to find it on sourceforge or wherever. You can put it in the muse (source) directory. 4. One does need those two .h files AEffect.h and aeffectx.h from Steinberg which will not be distributed with GPL stuff. Download the vst sdk from Steinberg and copy them to muse/vst which is where fst.h will look for them. 5. If one wants lash, install the development package from Sid.