Hi, I seems to me that shared libraries for profiling are not installed. For example, let's see the base library: % cd lib/ghc-7.7.20130616/base-4.7.0.0 % ls -1 libHSbase* libHSbase-4.7.0.0.a libHSbase-4.7.0.0-ghc7.7.20130616.so* libHSbase-4.7.0.0_p.a A static library for profiling is installed, but there is not a corresponding dynamic library. I'm suffering from this because I cannot take profiling for my program with GHC head. Is this a bug? --Kazu