If you used the installation script to install the complete system, you don't have to set up MinSoC anymore. But if you want to download a fresh MinSoC copy and already have the required tools, it is easier to download MinSoC and only set it up.
Assure yourself of having the following tools installed before trying to set up MinSoC:
Check out MinSoC from the Subversion repository:
svn co http://opencores.org/ocsvn/minsoc/minsoc/tags/release-1.0 minsoc
To oonfigure the system then, use the setup script:
Alternatively you can proceed with the manual set up.
cd minsoc/backend/std ./configure
cd minsoc/rtl/verilog/adv_debug_sys/Software/adv_jtag_bridge/sim_lib/icarus make cp jp-io-vpi.vpi minsoc/bench/verilog/vpi
cd minsoc/rtl/verilog/or1200/rtl/verilog patch -p0 < ../../../../../utils/setup/or1200v1_hwbkpt.patch