#151 make install does not honor --prefix= setting

[Chf]

./configure --prefix=/opt/cde --disable-docs --disable-silent-rules && make -j 8

[..]

make install

[..]
 /usr/bin/mkdir -p '/usr/dt/config/svc'
/usr/bin/mkdir: cannot create directory ‘/usr/dt’: Permission denied

Why is "make install" trying to install into /usr/dt when I explicitly configured prefix to be /opt/cde ? Seems like a bug to me. Any ideas?