libtool: error: error: cannot install 'libupnp.la' to a directory not ending in /usr/lib

Problem:

$ make
/bin/bash ../libtool   --mode=install /usr/bin/install -c   libupnp.la '/usr/local/lib'
libtool:   error: error: cannot install 'libupnp.la' to a directory not ending in /usr/lib

Cause:

I had changed the configure "--prefix"

Solution:

$ make clean