SuiteSparse is needed only by cvxopt, and we --disable-cvxopt. Sage
still runs its spkg-configure.m4 check, however, and the "force"
will cause an error even for packages that are disabled.
--with-system-scipy=force \
--with-system-singular=force \
--with-system-sqlite=force \
--with-system-scipy=force \
--with-system-singular=force \
--with-system-sqlite=force \
- --with-system-suitesparse=force \
--with-system-symmetrica=force \
--with-system-sympow=force \
--with-system-sympy=force \
--with-system-symmetrica=force \
--with-system-sympow=force \
--with-system-sympy=force \