+All detector libraries (including sample and util lib) require AliRoot,
+compilation is disabled if no working AliRoot version was found. This can
+occur even if an AliRoot version is set up correctly since the configure
+script checks for the usability of the AliRoot libraries (mainly STEER and
+the ones it depends on). If new dependencies are introduced, the check
+might fail.
+
+Compilation of detector libraries can be forced by the switch
+
+ --enable-detector, e.g. --enable-phos
+
+Compilation can also be forced by typing 'make' in the detector
+sub-directory.
+